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100 years ago,
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Gustav Holst's masterpiece
The Planets
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premiered at The Queen's Hall
in London.
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It has since become a favourite on
the concert platform.
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Holst's inspiration was more
astrological than astronomical.
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When he composed the seven
movement suites,
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Holst knew little of the physical
nature of the worlds he represented.
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But thanks to a century
of discovery,
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using space probes and rovers,
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these are now worlds we've
photographed...
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Worlds we've touched.
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And, yet, Holst's music is
just as powerful today,
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reminding us of the fragility of
humanity, adrift in the universe.
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OK.
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I've been working with
the BBC Symphony Orchestra
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and conductor Ben Gernon,
exploring the latest science.
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The images, I think, are very
powerful.
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I'll show you an image in a moment
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which I think is probably
my favourite image
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in the history of
space exploration.
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We want to discover if this new
knowledge
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can deliver a fresh
insight into the music.
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Tonight, at a special event at the
Barbican,
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all seven movements will be
performed...
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..this time, set to the backdrop of
the latest imagery of the planets.
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CROWD APPLAUD
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Holst's Planets were characterised
by their astrological
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and mythological characters.
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So, Mars, The Bringer Of War.
Venus, The Bringer Of Peace.
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Neptune, The Mystic.
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The aim of tonight's performance is
to explore how the music changes
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if we listen today, with the luxury
of 100 years of scientific discovery
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and, also, if we listen in today's
social and political context.
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You see, composers like Holst
were involved in and contributed
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to the political and intellectual
arguments of the day.
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Holst was on the left of politics,
and he was also a spiritual man.
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He was interested in eastern
philosophy,
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he learned Sanskrit, and his music
had a strong Indian influence.
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While he was writing The Planets,
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during the First World War and just
before the First World War,
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a time of great social, and economic
and geo-political instability,
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his character, his interests,
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and his political ideas are
reflected in The Planets.
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Precisely how, of course,
is open to interpretation.
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That is the point of great art.
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But an interpretation
I find interesting
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is that The Planets can be
seen as an intellectual journey,
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informed by Holst's socialism,
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and his attraction to eastern
mysticism.
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In fact, the director Tony Palmer,
in his film on Holst,
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wrote that in this context,
The Planets begins to make sense.
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Not as an astrological chart,
a la Mystic Meg,
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but as a pilgrim's progress
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from the ferocity of industrial
capitalism, represented by Mars,
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towards a karma of enlightenment,
represented by Neptune.
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Now, tonight I'm not
interested in arguing for this,
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or indeed, any other
particular interpretation.
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What I am interested in is how
the work might suggest new ideas
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when set in a 21st century context,
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alongside the images and the
understanding of the solar system
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to which we now have access.
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This is a modern day spacecraft
picture of Mars.
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Everywhere we look,
we see evidence of rivers.
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So Mars, actually, was a world which
could have supported life
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about 3 billion years ago.
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Now we know that there's water on
Mars, there are minerals on Mars,
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pretty much everything you need
to support human life
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in a civilisation.
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And so Mars becomes not a bringer
of war,
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kind of a terrifying red
object in the sky,
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but a bringer
of opportunity and hope.
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I think it's really interesting.
There's a moment...
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Actually, in the orchestra, if
we could just have a look, please.
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And it's four bars before Figure 5.
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And I'm wondering if we could just
soften this
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to make this more hopeful?
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This fanfare that we have
in the brass, instead of it being
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da-da-da-da-da-da-da-da-dee,
da-da-dum,
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could it be
da-da-da-da-da-da-da-da-dee?
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So it's ever so slightly softer
and, maybe, as you were saying,
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Brian, offers a sort of place for
hope.
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Mars, as Holst would have known it,
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was not a well-resolved planet,
if you like.
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The photograph behind me is a
photograph taken by telescope
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that was commissioned in 1917,
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so, in fact, just after Holst had
written the piece.
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What you see is a fuzzy blob.
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You can see dark
markings on the surface.
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And at the time, even reputable
astronomers mistook those markings
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for, perhaps, signs of vegetation.
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That image of Mars was dashed
when we went there with spacecraft.
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The first spacecraft to fly past
was in 1965,
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the Mariner 4 spacecraft.
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And it sent back grainy
images of the surface.
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President Lyndon Johnson, president
at the time, reflected.
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He said, "It may be, it just may be,
that life as we know it,
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"with its humanity, is more unique
than we may have thought."
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If we move forward to today,
a fleet of spacecraft have visited.
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The first thing we see is
a world of geological giants,
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that you see a canyon spanning over
half the face of the planet,
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which is called the Mariner Valley
after the Mariner spacecraft.
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The Grand Canyon here on Earth would
fit into one of its side channels.
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It's also a planet
of great volcanoes.
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We have good evidence that there
were lakes,
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possibly even oceans on Mars.
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We've landed on Mars.
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As I speak, there's a robot called
Curiosity,
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which is exploring an old dry lake
bed.
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It's found the signatures of organic
molecules,
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it's found signatures of minerals
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that only form in the presence of
standing water.
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So we've built a picture up of Mars
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that tells us that it was
Earth-like
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perhaps three and a half
billion years ago,
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with rivers and oceans and seas.
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In a sense, it could have been a
living world.
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Whether life began there,
we don't know.
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But what's interesting is that this
changes our view of Mars again,
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because a planet like Mars
that had water,
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and still has water, becomes a
planet that has everything you need
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to build a civilisation, to sustain
life, to sustain human beings.
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So even if there weren't Martians
three and a half billion years ago,
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even if there aren't still Martian
microbes today living sub-surface,
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there will probably one day
be Martians,
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because the Martians will be us.
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Can we listen to Holst's Mars
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and forget the deeply ingrained
20th century symbolism
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of mechanised warfare?
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Can we instead view Mars
with optimism?
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Having survived the barbarism of the
20th century,
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our technology and our rockets are
now free
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to deliver perspective on our cosmic
isolation,
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to provide a bridge to the future
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where humanity is no longer confined
to a single world.
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MUSIC: Mars, The Bringer of War
by Gustav Holst
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CROWD APPLAUDS
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I think the photographs of Holst
speak to me about the time.
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So he was late-thirties,
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40 or so when he wrote
The Planets. Mm-hmm.
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But Holst didn't have so much
success as a composer
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before he wrote this piece.
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I often get the impression that he
was searching for something deeper
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and more meaningful than his current
existence.
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The First World War
was on the horizon.
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He wanted to sign up, he couldn't
sign up, because he was ill.
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He will have friends and colleagues
go and fight on the Front,
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potentially never come home.
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The historical context
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within which this piece was written
is frightening.
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We didn't know there
was an origin to the universe.
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We didn't know how the sun shone,
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so we didn't know about nuclear
physics.
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So all those things that we almost
take for granted now...
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..we'd not known.
That's what's interesting.
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This is music from a time
when we had no idea
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about our place
in the wider universe.
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And I'm intrigued to know,
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so if Holst was standing in his back
garden at night,
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what could he see in the sky?
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With the naked eye, he would've been
able to see Venus, of course.
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I mean, Venus is often, depending
on where it is in its orbit,
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but often the brightest
thing in the sky,
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either close to sunset
or close to sunrise.
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It's always close to the sun.
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So he would have seen Venus
very bright, Jupiter, Saturn,
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Mars, again extremely bright.
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But that's pretty much it. Mmm.
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CROWD APPLAUDS
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Venus, The Bringer Of Peace.
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It's a planet that's very
Earth-like in many ways.
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It's not too much closer to the sun.
It's about the same size as Earth.
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And this really led astronomers
in Holst's time
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to consider it potentially Earth's
twin.
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Just like Mars, it was considered to
be a world which may harbour life.
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We can never see the ground from
Earth, it's shrouded in clouds.
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And that added, I think, to this
idea
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that Venus may be a tropical
paradise.
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But as with Mars, you know,
we had a shock
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when we first started to point,
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initially, radio telescopes to
Venus,
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and then began to fly space
probes past the planet.
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We found that Venus is
a scorched world.
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This is a photograph from a Russian
spacecraft called Venera 9,
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which landed in 1975.
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It found a world that it could
barely survive.
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It only lasted for around an hour.
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It measured temperatures of 465
degrees Celsius on the surface.
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The atmospheric pressure is 90 times
the atmospheric pressure on Earth.
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That means if you or I stood on
Venus,
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we would be toasted
and then squashed.
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And if that didn't do it for us,
we would be dissolved,
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because the clouds of Venus
rain down sulphuric acid.
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So, far from being an idyllic,
beautiful bringer of peace,
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the goddess of love,
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Venus is the closest world to hell
you could imagine.
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AUDIENCE LAUGHS
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Then we started peering through
the clouds using radar,
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and we see a surface that is
covered in volcanoes,
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far more volcanoes than any other
planet in the solar system.
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What's interesting, though,
is that it seems that, again,
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like Mars, Venus would have had
water on the surface,
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may have been a habitable world,
may even have given rise to life,
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may have been that paradise.
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But something went wrong on Venus.
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Those volcanoes pumped carbon
dioxide, sulphur dioxide,
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greenhouse gasses
into the atmosphere.
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The cycles of the planet ran
away with themselves.
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A runaway greenhouse effect
heated the planet up
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and destroyed it, certainly as a
habitable world.
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So I think the lesson of Venus is
that planets are not eternal.
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A world that was once heaven
can become hell.
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Venus, Bringer Of Peace, becomes
a requiem for a failed planet,
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and perhaps also a reflection on
how rare places like Earth might be.
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MUSIC: Venus, Bringer Of Peace
by Gustav Holst
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It is a vision of hell.
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And I think that's fascinating
when you set it against the music.
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I think that this idea that there
are just small falling motifs
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and there's a couple of solos
in the orchestra as well,
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so, really as a listener,
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you're drawn into extremely personal
and lonely sounds.
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And then the piece ends with just
the second violins playing.
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A very long diminuendo,
suspended high note,
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and you are left with this
sense of loss.
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I'm sure Holst did not intend Venus
to be listened to that way.
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How do you feel about that
re-interpretation?
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Erm, so I find this layering
fascinating because, you know,
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human beings aren't just 1-D things
that write seven notes on the page
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and it forever means
that it's locked in history.
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It's almost as if he had a weird
premonition
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of what was to come, in terms of
some of the research as well,
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because how can it be that this
music is so easily transformed?
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And it sort of adds to the
more mystical
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and mysterious side to his character
and what he wrote.
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Mercury, The Winged Messenger.
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There are spacecraft whose
job it is to observe the sun,
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and one of them is called
the Solar Dynamics Observatory.
237
00:29:46,640 --> 00:29:50,920
It just sort of sits there and looks
for solar flares and solar storms,
238
00:29:50,920 --> 00:29:52,960
watching how the sun behaves.
239
00:29:52,960 --> 00:29:58,120
But occasionally, the spacecraft
capture something quite magical.
240
00:29:58,120 --> 00:30:01,280
They capture what's called
a transit of Mercury,
241
00:30:01,280 --> 00:30:06,760
a small black dot, tracing its way
across the face of the star.
242
00:30:06,760 --> 00:30:10,240
Now, Mercury zips around
the sun very fast.
243
00:30:10,240 --> 00:30:14,960
"The Winged Messenger"
is a rather nice title
244
00:30:14,960 --> 00:30:20,040
because it's very close to the sun,
but very difficult to get to.
245
00:30:20,040 --> 00:30:24,440
The Mercury Messenger spacecraft, it
took seven years to get to Mercury.
246
00:30:24,440 --> 00:30:27,680
It had to fly around the Earth once,
then go round Venus twice
247
00:30:27,680 --> 00:30:29,960
and then round Mercury three times
248
00:30:29,960 --> 00:30:33,160
before it had slowed down enough
to get into orbit.
249
00:30:33,160 --> 00:30:37,880
What it found was a world that...
Well, we knew it would be hot.
250
00:30:37,880 --> 00:30:40,480
It's close to the sun. It's about
430 degrees Celsius
251
00:30:40,480 --> 00:30:42,120
by day on the surface.
252
00:30:42,120 --> 00:30:44,560
However, because there's no
atmosphere on Mercury,
253
00:30:44,560 --> 00:30:48,720
it drops to about minus 180 degrees
Celsius at night,
254
00:30:48,720 --> 00:30:51,560
so it's a world of extremes.
255
00:30:51,560 --> 00:30:54,920
Messenger found traces of what
astronomers called
256
00:30:54,920 --> 00:30:56,320
"volatiles" on the surface,
257
00:30:56,320 --> 00:30:58,040
things like potassium.
258
00:30:58,040 --> 00:30:59,800
Now, that's interesting,
259
00:30:59,800 --> 00:31:03,520
because potassium is only expected
to be found on planets
260
00:31:03,520 --> 00:31:06,320
that form further out in the solar
system.
261
00:31:06,320 --> 00:31:08,240
They're called volatiles for a
reason.
262
00:31:08,240 --> 00:31:11,280
They boil away when they're close to
the sun.
263
00:31:11,280 --> 00:31:16,680
So we now think that Mercury formed
much further away from the sun
264
00:31:16,680 --> 00:31:19,880
than the position where it orbits
today.
265
00:31:19,880 --> 00:31:23,360
So again, the Winged Messenger
seems to be rather apt.
266
00:31:23,360 --> 00:31:26,920
Mercury has shifted a great deal in
its orbit
267
00:31:26,920 --> 00:31:29,880
during the history
of the solar system and, in fact,
268
00:31:29,880 --> 00:31:33,200
our simulations suggest that
it's at least possible
269
00:31:33,200 --> 00:31:37,960
that Mercury will shift again and
fly out into the outer solar system,
270
00:31:37,960 --> 00:31:42,240
perhaps even be lost into
interstellar space.
271
00:31:42,240 --> 00:31:47,040
So Mercury illustrates another
important point.
272
00:31:47,040 --> 00:31:51,240
The solar system is not a piece of
eternal clockwork
273
00:31:51,240 --> 00:31:57,080
crafted by the gods, but a dynamic
living and evolving place.
274
00:32:01,920 --> 00:32:05,400
MUSIC: Mercury, The Winged Messenger
by Gustav Holst
275
00:36:12,480 --> 00:36:16,840
Jupiter is a dominant planet
in the solar system, in a sense.
276
00:36:16,840 --> 00:36:20,600
It's two and a half times
the mass of all the other planets
277
00:36:20,600 --> 00:36:22,560
and moons combined.
278
00:36:22,560 --> 00:36:24,800
And that means that it's really
the only object
279
00:36:24,800 --> 00:36:27,040
in the solar system, other than the
sun,
280
00:36:27,040 --> 00:36:30,440
that has a quite profound
gravitational influence
281
00:36:30,440 --> 00:36:32,400
on the rest of the system.
282
00:36:32,400 --> 00:36:36,680
For example, the asteroid that wiped
out the dinosaurs
283
00:36:36,680 --> 00:36:40,120
here on Earth 66 million years ago
is likely,
284
00:36:40,120 --> 00:36:43,680
or at least it's possible, that it
was deflected
285
00:36:43,680 --> 00:36:47,520
on to a collision course with Earth
by Jupiter.
286
00:36:47,520 --> 00:36:52,320
Jupiter is a creator
and destroyer of worlds.
287
00:36:52,320 --> 00:36:56,080
Now, we have a spacecraft in orbit
around Jupiter now called Juno,
288
00:36:56,080 --> 00:37:01,000
which is sending back the most
remarkable images of the planet.
289
00:37:01,000 --> 00:37:03,360
It's a spacecraft that,
for the first time,
290
00:37:03,360 --> 00:37:06,240
orbits the north
and south pole of Jupiter.
291
00:37:06,240 --> 00:37:08,680
When you zoom in, you see images of
clouds
292
00:37:08,680 --> 00:37:11,720
that look almost like
Impressionist paintings.
293
00:37:11,720 --> 00:37:15,160
The storm that we're probably most
aware of on Jupiter
294
00:37:15,160 --> 00:37:16,600
is the Great Red Spot.
295
00:37:16,600 --> 00:37:20,960
But it is shrinking, so
when Galileo saw the storm system,
296
00:37:20,960 --> 00:37:24,120
you could have lined up three
Earths in that spot.
297
00:37:24,120 --> 00:37:26,960
Gives you a sense of scale of
Jupiter. Now it's shrunk,
298
00:37:26,960 --> 00:37:30,000
you could only fit about two Earths
across the diameter.
299
00:37:30,000 --> 00:37:33,440
But it's still a big and long-lived
storm.
300
00:37:33,440 --> 00:37:36,600
Jupiter is a fascinating
world in itself,
301
00:37:36,600 --> 00:37:40,120
but equally fascinating is its own
mini solar system,
302
00:37:40,120 --> 00:37:42,480
its moons, over 70 moons.
303
00:37:42,480 --> 00:37:47,280
And the four brightest
were discovered by Galileo.
304
00:37:47,280 --> 00:37:50,320
These moons played an extremely
important role
305
00:37:50,320 --> 00:37:52,320
in the history of
human thought,
306
00:37:52,320 --> 00:37:55,200
because they confirmed to Galileo
307
00:37:55,200 --> 00:37:58,080
that we
are not the centre of the universe.
308
00:37:58,080 --> 00:38:00,480
Because when you look at Jupiter
through a telescope,
309
00:38:00,480 --> 00:38:05,720
it's obvious that those moons are in
orbit around it and not around us.
310
00:38:05,720 --> 00:38:09,400
Those moons are worlds
with their own characters.
311
00:38:09,400 --> 00:38:14,800
Io is the most volcanically active
body in the solar system.
312
00:38:14,800 --> 00:38:18,240
And then, a rather magical world
called Europa,
313
00:38:18,240 --> 00:38:22,600
a moon covered in a shell
of frozen water ice.
314
00:38:22,600 --> 00:38:25,880
But we know that beneath that shell
of water ice,
315
00:38:25,880 --> 00:38:29,520
there is an ocean of liquid
salt-water.
316
00:38:29,520 --> 00:38:34,400
It contains more water than all
the oceans of the Earth combined.
317
00:38:34,400 --> 00:38:38,320
And so Europa may well be a home
for life.
318
00:38:39,680 --> 00:38:42,360
Now, we've got our first
pictures of the planet,
319
00:38:42,360 --> 00:38:46,560
and particularly the moons, from two
iconic spacecraft,
320
00:38:46,560 --> 00:38:49,040
Voyager 1 and Voyager 2.
321
00:38:49,040 --> 00:38:52,160
These spacecraft were
launched in 1977.
322
00:38:52,160 --> 00:38:54,800
They arrived at Jupiter in 1979.
323
00:38:54,800 --> 00:38:57,640
We are still in touch with them
both today,
324
00:38:57,640 --> 00:39:00,200
41 years after they were launched.
325
00:39:00,200 --> 00:39:06,080
Voyager 1 is 13.3 billion miles away
from Earth in interstellar space.
326
00:39:06,080 --> 00:39:08,000
It's a tiny little thing.
327
00:39:08,000 --> 00:39:10,240
I want to show you this photograph
of me
328
00:39:10,240 --> 00:39:14,200
standing in front of a scale
model of it at JPL in California.
329
00:39:14,200 --> 00:39:16,680
It's a remarkable engineering
achievement.
330
00:39:16,680 --> 00:39:21,440
On Valentine's Day, 1990, as it was
on its way out of the solar system,
331
00:39:21,440 --> 00:39:24,760
it took what I think is
the most famous image,
332
00:39:24,760 --> 00:39:27,800
certainly of Earth, in the history
of space exploration,
333
00:39:27,800 --> 00:39:30,840
when it was 4 billion miles from
home.
334
00:39:30,840 --> 00:39:33,480
It's called the Pale Blue Dot image.
335
00:39:33,480 --> 00:39:36,320
Now, there are coloured stripes
crossing the image,
336
00:39:36,320 --> 00:39:37,960
which are lens flare.
337
00:39:37,960 --> 00:39:40,200
But if you look carefully
in the red stripe,
338
00:39:40,200 --> 00:39:44,240
you'll see a point of light,
which is our planet, the Earth,
339
00:39:44,240 --> 00:39:45,840
the Pale Blue Dot.
340
00:39:45,840 --> 00:39:48,320
Carl Sagan, who's one of my great
heroes,
341
00:39:48,320 --> 00:39:51,920
wrote a very powerful piece of prose
about this image,
342
00:39:51,920 --> 00:39:55,440
reflecting on what it tells us
about our place in the universe.
343
00:39:55,440 --> 00:39:57,680
"The Earth," he wrote,
344
00:39:57,680 --> 00:40:01,920
"..is a very small stage in a vast
cosmic arena.
345
00:40:01,920 --> 00:40:05,800
"Think of the rivers of blood
spilled by all those generals
346
00:40:05,800 --> 00:40:09,920
"and emperors so that in glory
and in triumph,
347
00:40:09,920 --> 00:40:14,640
"they could become the momentary
masters of a fraction of a dot.
348
00:40:14,640 --> 00:40:16,960
"Think of the endless cruelties
visited
349
00:40:16,960 --> 00:40:20,440
"by the inhabitants of one corner of
this dot
350
00:40:20,440 --> 00:40:24,120
"on the scarcely distinguishable
inhabitants
351
00:40:24,120 --> 00:40:26,840
"of some other corner of the dot.
352
00:40:26,840 --> 00:40:29,000
"How frequent their
misunderstandings,
353
00:40:29,000 --> 00:40:31,400
"how eager they are to kill
one another.
354
00:40:31,400 --> 00:40:33,600
"How fervent their hatreds.
355
00:40:33,600 --> 00:40:36,720
"Our posturings,
our imagined self-importance,
356
00:40:36,720 --> 00:40:41,280
"the delusion that we have some
privileged position in the universe
357
00:40:41,280 --> 00:40:45,520
"are challenged by this
point of pale light."
358
00:40:45,520 --> 00:40:49,560
This idea that Jupiter might
represent humility,
359
00:40:49,560 --> 00:40:51,920
they're the beginnings of the
realisation
360
00:40:51,920 --> 00:40:56,560
that we are perhaps more fragile,
smaller, and more interdependent,
361
00:40:56,560 --> 00:40:59,680
both with each other and the wider
universe,
362
00:40:59,680 --> 00:41:01,960
than we often like to imagine.
363
00:41:01,960 --> 00:41:06,320
I find fascinating, in the context
of tonight's performance,
364
00:41:06,320 --> 00:41:08,400
that Holst's Jupiter, after all,
365
00:41:08,400 --> 00:41:12,320
contains one of the most well-known
passages in classical music,
366
00:41:12,320 --> 00:41:15,680
the lyrical section that became
the patriotic hymn
367
00:41:15,680 --> 00:41:18,200
I Vow To Thee, My Country.
368
00:41:18,200 --> 00:41:22,480
Patriotism. The love of country.
These are important ideas.
369
00:41:22,480 --> 00:41:24,800
They were important to Holst.
370
00:41:24,800 --> 00:41:30,000
But so, too, is the idea that we
are one civilisation
371
00:41:30,000 --> 00:41:33,160
living together precariously on one
planet
372
00:41:33,160 --> 00:41:37,360
in an ever-changing and
always-challenging universe.
373
00:41:37,360 --> 00:41:41,840
If we are to avoid Sagan's endless
cruelties of history,
374
00:41:41,840 --> 00:41:45,600
we must find a way to reconcile
our affection for our countries
375
00:41:45,600 --> 00:41:49,400
with our responsibility
to protect our home world
376
00:41:49,400 --> 00:41:51,360
by working together.
377
00:41:51,360 --> 00:41:53,840
It's my view that the exploration
of space
378
00:41:53,840 --> 00:41:57,040
has helped deliver this perspective.
379
00:41:57,040 --> 00:42:01,800
CROWD APPLAUDS
380
00:42:07,240 --> 00:42:11,160
MUSIC: Jupiter, The Bringer Of
Jollity by Gustav Holst
381
00:49:44,920 --> 00:49:47,760
CROWD APPLAUDS
382
00:50:00,760 --> 00:50:02,400
And what I think is really
interesting is,
383
00:50:02,400 --> 00:50:05,040
in terms of all the planets and all
of the movements,
384
00:50:05,040 --> 00:50:07,680
this is the one planet that has
the most important
385
00:50:07,680 --> 00:50:11,520
and emotional journey where you have
the physical decay of death
386
00:50:11,520 --> 00:50:14,480
at the beginning, and then of serene
acceptance.
387
00:50:14,480 --> 00:50:15,680
That's a good point.
388
00:50:15,680 --> 00:50:18,880
I mean, I could show so many
pictures from the Cassini spacecraft
389
00:50:18,880 --> 00:50:21,680
which was in orbit around Saturn for
a long time.
390
00:50:21,680 --> 00:50:24,480
The interesting thing about this
ring system
391
00:50:24,480 --> 00:50:27,960
that we learnt recently is that it's
extremely young,
392
00:50:27,960 --> 00:50:31,400
probably only tens of millions
of years old,
393
00:50:31,400 --> 00:50:35,080
a dynamic world that's changed
radically over...
394
00:50:35,080 --> 00:50:38,920
in a fraction, the blink
of an eye in geological time.
395
00:50:38,920 --> 00:50:42,200
And I think how this fits in is
maybe the serene acceptance
396
00:50:42,200 --> 00:50:44,640
could be a sense or renewal
and rebirth
397
00:50:44,640 --> 00:50:48,280
and things growing and
things not dying.
398
00:50:50,320 --> 00:50:52,960
Saturn, The Bringer Of Old Age.
399
00:50:52,960 --> 00:50:56,000
Saturn is, I suppose,
the most iconic planet,
400
00:50:56,000 --> 00:50:58,840
made famous by its ring system.
401
00:50:58,840 --> 00:51:04,120
They are an intricate system,
beautifully complex,
402
00:51:04,120 --> 00:51:06,800
made of a very simple thing -
ice,
403
00:51:06,800 --> 00:51:12,040
water ice sprinkled around the
planet. Snowflakes, if you like.
404
00:51:12,040 --> 00:51:14,480
A friend of mine who worked on the
Cassini probe,
405
00:51:14,480 --> 00:51:17,280
which has taken the most spectacular
images of Saturn,
406
00:51:17,280 --> 00:51:21,200
said that it's like, you know when
you get a magnet
407
00:51:21,200 --> 00:51:24,480
and sprinkle iron filings over it,
and you can see the magnetic field?
408
00:51:24,480 --> 00:51:27,760
Well, in the same way,
it's like some deity
409
00:51:27,760 --> 00:51:30,400
has sprinkled snowflakes over Saturn
410
00:51:30,400 --> 00:51:33,040
so you can see the gravitational
field.
411
00:51:33,040 --> 00:51:38,160
Its rings, they look impossibly
thin and they are impossibly thin.
412
00:51:38,160 --> 00:51:41,960
They're, in fact,
only around ten metres thick,
413
00:51:41,960 --> 00:51:46,160
so they would fit comfortably inside
this auditorium.
414
00:51:46,160 --> 00:51:51,960
And they also, we've
found, are most likely young.
415
00:51:51,960 --> 00:51:56,360
What we think happened was that
a moon came close to the planets,
416
00:51:56,360 --> 00:51:58,440
probably in collision with
another moon,
417
00:51:58,440 --> 00:52:01,600
or perhaps a gravitational
interaction with another moon,
418
00:52:01,600 --> 00:52:05,720
and then dissociated and broke up to
form the rings.
419
00:52:05,720 --> 00:52:07,880
It's possible that they
weren't there
420
00:52:07,880 --> 00:52:10,160
when the dinosaurs were on Earth.
421
00:52:10,160 --> 00:52:12,800
So if the dinosaurs had invented
telescopes
422
00:52:12,800 --> 00:52:14,760
and looked up at Saturn,
423
00:52:14,760 --> 00:52:19,080
they may well not have seen that
planet that we see today.
424
00:52:20,080 --> 00:52:24,400
Saturn has one of the largest
moons in the solar system, Titan,
425
00:52:24,400 --> 00:52:28,840
which, in this image,
you see above the ring plane.
426
00:52:30,040 --> 00:52:33,080
Titan is the only
object in the solar system,
427
00:52:33,080 --> 00:52:36,000
other than Earth,
that has liquid on its surface.
428
00:52:36,000 --> 00:52:37,840
But it's freezing cold,
429
00:52:37,840 --> 00:52:41,840
a long way from the sun, minus 180
degrees Celsius or so.
430
00:52:41,840 --> 00:52:45,480
So that liquid is not water.
It's liquid methane.
431
00:52:45,480 --> 00:52:47,360
Liquefied natural gas.
432
00:52:47,360 --> 00:52:52,320
So this moon has lakes and seas
and rivers of methane.
433
00:52:52,320 --> 00:52:54,840
It has methane rain
and methane snow.
434
00:52:54,840 --> 00:52:56,680
A methanological cycle,
435
00:52:56,680 --> 00:53:00,680
in the same way that Earth has
a hydrological cycle.
436
00:53:00,680 --> 00:53:04,600
We also think that it may have
liquid water below the surface,
437
00:53:04,600 --> 00:53:09,480
so, again, this is an interesting
moon in the context of life.
438
00:53:09,480 --> 00:53:13,280
But there is another moon around
Saturn that is equally,
439
00:53:13,280 --> 00:53:15,560
even perhaps more intriguing.
440
00:53:15,560 --> 00:53:17,760
It's a moon called Enceladus.
441
00:53:17,760 --> 00:53:21,040
What we see on Enceladus
are fountains of ice
442
00:53:21,040 --> 00:53:25,720
rising up from the surface
and disappearing off into space.
443
00:53:25,720 --> 00:53:29,520
Beautiful, but what we think is
causing those fountains
444
00:53:29,520 --> 00:53:31,200
is even more beautiful.
445
00:53:31,200 --> 00:53:33,640
We are now, I would say, certain
446
00:53:33,640 --> 00:53:38,520
that there are lakes of liquid water
below the surface of Enceladus.
447
00:53:38,520 --> 00:53:43,600
And on the floors of those lakes, we
think there are geological systems.
448
00:53:43,600 --> 00:53:46,240
Systems called hydrothermal vents.
449
00:53:46,240 --> 00:53:48,280
Now, that is fascinating
450
00:53:48,280 --> 00:53:52,000
because we think that one of the
prime candidates
451
00:53:52,000 --> 00:53:55,560
for the origin of life on Earth 3.8
billion years ago
452
00:53:55,560 --> 00:53:58,080
are hydrothermal vent systems,
453
00:53:58,080 --> 00:54:03,520
where you get energy in contact with
rock, in contact with minerals,
454
00:54:03,520 --> 00:54:05,920
and that transition from
geo-chemistry
455
00:54:05,920 --> 00:54:07,760
to biochemistry happened.
456
00:54:07,760 --> 00:54:10,600
So this moon is one of the prime
candidates
457
00:54:10,600 --> 00:54:14,640
to look for life beyond Earth
in the solar system.
458
00:54:14,640 --> 00:54:16,480
And when we look at images
of Saturn,
459
00:54:16,480 --> 00:54:18,960
which are backlit by the sun,
460
00:54:18,960 --> 00:54:21,400
you see the sunlight illuminating
the rings.
461
00:54:21,400 --> 00:54:25,440
There's a diffuse ring far away
from Saturn known as the E Ring,
462
00:54:25,440 --> 00:54:29,320
which is created by the ice
fountains of Enceladus.
463
00:54:29,320 --> 00:54:33,960
So it's a tiny moon, but with
a potentially dramatic impact,
464
00:54:33,960 --> 00:54:37,320
in terms of the creation of the
rings, but also philosophically,
465
00:54:37,320 --> 00:54:40,440
intellectually, as a possible home
for life.
466
00:54:40,440 --> 00:54:46,000
So, Saturn, The Bringer Of Old Age,
in Holst's mind,
467
00:54:46,000 --> 00:54:49,600
is not a world enjoying
a sedate old age.
468
00:54:49,600 --> 00:54:51,400
It's a dynamic world,
469
00:54:51,400 --> 00:54:55,520
a fast-changing system,
constantly rejuvenating,
470
00:54:55,520 --> 00:54:58,320
raging against the dying
of the light.
471
00:54:58,320 --> 00:55:01,720
And its moons, in particular tiny
Enceladus,
472
00:55:01,720 --> 00:55:07,480
are perhaps engaged in the most
spectacular rejuvenation of all.
473
00:55:07,480 --> 00:55:10,640
That natural transformation of rock
and minerals and water
474
00:55:10,640 --> 00:55:13,520
and heat into living matter.
475
00:55:13,520 --> 00:55:17,440
They're the transition
from geo-chemistry to biochemistry
476
00:55:17,440 --> 00:55:19,880
that brings meaning to the universe.
477
00:55:25,360 --> 00:55:31,560
MUSIC: Saturn, the Bringer of Old
Age by Gustav Holst
478
01:03:59,440 --> 01:04:03,840
CROWD APPLAUD
479
01:04:03,840 --> 01:04:09,120
We are now entering the mysterious
dark frontier of the solar system.
480
01:04:09,120 --> 01:04:11,480
Uranus, the Magician.
481
01:04:11,480 --> 01:04:16,080
These worlds would have been
absolutely unfamiliar to Holst.
482
01:04:16,080 --> 01:04:20,680
No more than points of light,
because they are so far away.
483
01:04:20,680 --> 01:04:22,120
When we look at Uranus
484
01:04:22,120 --> 01:04:25,400
through our most powerful telescopes
on Earth,
485
01:04:25,400 --> 01:04:30,360
and here you see it through The VLT,
the Very Large Telescope...
486
01:04:30,360 --> 01:04:32,160
It's powerful.
487
01:04:32,160 --> 01:04:37,040
..we see that it's a planet you can
see some surface features.
488
01:04:37,040 --> 01:04:40,960
It's a blue planet with white,
high altitude clouds.
489
01:04:40,960 --> 01:04:45,440
And also, four moons are visible in
this VLT image.
490
01:04:45,440 --> 01:04:49,680
The image looks odd, though, because
the moons are aligned vertically.
491
01:04:49,680 --> 01:04:52,560
The planet appears to be tipped
up on its side.
492
01:04:52,560 --> 01:04:54,520
And that's because it is.
493
01:04:54,520 --> 01:04:58,480
That's one of the most mysterious
things about Uranus,
494
01:04:58,480 --> 01:05:02,240
it orbits the sun with its poles
leading the way.
495
01:05:02,240 --> 01:05:03,480
Now, why?
496
01:05:03,480 --> 01:05:08,120
It's almost certain that Uranus must
have been hit by a large planet
497
01:05:08,120 --> 01:05:10,840
at some point in the very distant
past,
498
01:05:10,840 --> 01:05:12,480
four and a half billion years
ago
499
01:05:12,480 --> 01:05:16,200
during the formation of the solar
system, which tipped it over.
500
01:05:16,200 --> 01:05:18,640
Also from Earth-based telescopes,
501
01:05:18,640 --> 01:05:20,920
we can see that Uranus has
a ring system.
502
01:05:20,920 --> 01:05:23,400
It's nowhere near as spectacular
as Saturn's rings,
503
01:05:23,400 --> 01:05:26,600
but they're rings, nonetheless.
504
01:05:26,600 --> 01:05:29,840
Sunlight out there is only
1/400th
505
01:05:29,840 --> 01:05:32,720
of the intensity of sunlight
here on Earth.
506
01:05:32,720 --> 01:05:38,800
Temperatures are very low, the cloud
tops are minus 224 degrees Celsius.
507
01:05:38,800 --> 01:05:41,200
But there are very powerful
winds there.
508
01:05:41,200 --> 01:05:45,120
The winds at the equator
move at 200mph,
509
01:05:45,120 --> 01:05:48,760
but in the opposite direction to
its spin. Very strange.
510
01:05:48,760 --> 01:05:51,600
But as you move up to the tropics,
towards the poles,
511
01:05:51,600 --> 01:05:57,480
the winds reverse direction
and blow in excess of 500mph.
512
01:05:57,480 --> 01:06:00,520
The moons are beautifully named,
actually.
513
01:06:00,520 --> 01:06:03,400
They're named after
Shakespearian spirits
514
01:06:03,400 --> 01:06:05,400
and spirits in English literature.
515
01:06:05,400 --> 01:06:08,280
So Umbriel, Ariel, Miranda.
516
01:06:08,280 --> 01:06:13,120
Now, the only spacecraft to make it
this far out was Voyager 2.
517
01:06:13,120 --> 01:06:14,360
The photographs,
518
01:06:14,360 --> 01:06:18,000
because light is so dim and Voyager
was travelling so fast,
519
01:06:18,000 --> 01:06:19,840
are quite blurry sometimes.
520
01:06:19,840 --> 01:06:23,080
This is a photograph of Umbriel.
You don't see much detail.
521
01:06:23,080 --> 01:06:25,120
And Miranda...
522
01:06:25,120 --> 01:06:27,160
..which is one of my favourite
moons,
523
01:06:27,160 --> 01:06:30,880
because it really does look like
some kind of drunken deity
524
01:06:30,880 --> 01:06:32,840
assembled it on their day off.
525
01:06:32,840 --> 01:06:37,800
It's a complete mess. Bits of rigid
sort of... Bits of rock stuck on.
526
01:06:37,800 --> 01:06:38,880
Big canyons.
527
01:06:38,880 --> 01:06:41,360
And the reason, of course, is it
must have been split apart
528
01:06:41,360 --> 01:06:45,480
by a collision many billions of
years ago, and then reformed.
529
01:06:45,480 --> 01:06:49,200
So, the Uranus system is
a strange system.
530
01:06:49,200 --> 01:06:51,920
It's a long way away from the Earth.
531
01:06:51,920 --> 01:06:55,000
Voyager only spent five and a half
hours in the system
532
01:06:55,000 --> 01:06:57,040
as it travelled through,
taking these,
533
01:06:57,040 --> 01:07:01,280
the only photographs we have from
near the planet,
534
01:07:01,280 --> 01:07:02,520
and then left,
535
01:07:02,520 --> 01:07:07,280
leaving the strange tilted magician
behind in the twilight.
536
01:07:12,920 --> 01:07:17,480
MUSIC: Uranus, the Magician
by Gustav Holst
537
01:12:44,440 --> 01:12:46,240
CROWD APPLAUDS
538
01:12:46,240 --> 01:12:48,560
Neptune does sound like the
soundtrack
539
01:12:48,560 --> 01:12:51,080
to a 1960s science fiction movie in
a way, doesn't it?
540
01:12:51,080 --> 01:12:53,120
Sounds very Star Trek-y,
actually, at the end.
541
01:12:53,120 --> 01:12:56,880
Yeah, I think
he's such a mini John Williams
542
01:12:56,880 --> 01:13:00,200
because you hear the celeste,
you hear the harps,
543
01:13:00,200 --> 01:13:03,840
you hear the harmony that's not
quite conventional,
544
01:13:03,840 --> 01:13:06,080
you hear the low brooding sounds.
545
01:13:06,080 --> 01:13:08,320
And he does create this
world
546
01:13:08,320 --> 01:13:12,000
that we have associated with
blockbuster movies.
547
01:13:12,000 --> 01:13:13,640
I mean, if you were to
look in the score,
548
01:13:13,640 --> 01:13:15,440
just at the end,
at the ladies' chorus...
549
01:13:17,280 --> 01:13:20,120
..this is a facsimile
of the original score.
550
01:13:20,120 --> 01:13:23,560
This bar is to be repeated until the
sound is lost in the distance.
551
01:13:30,920 --> 01:13:32,800
FEMALE CHORAL SINGING
552
01:13:32,800 --> 01:13:35,600
You have this wonderful ethereal
quality to the voices
553
01:13:35,600 --> 01:13:39,560
where you can't quite hear what
exactly is going on
554
01:13:39,560 --> 01:13:40,880
or what they're saying,
555
01:13:40,880 --> 01:13:45,600
but it creates this space for you as
a listener where you think,
556
01:13:45,600 --> 01:13:47,320
"Actually, what is out there?"
557
01:13:48,560 --> 01:13:51,160
And then you end up with this
thing which is...
558
01:13:51,160 --> 01:13:53,000
..you know, the fading away.
559
01:13:54,040 --> 01:13:58,920
"Lost in the distance",
he writes. Which is...
560
01:13:58,920 --> 01:14:01,840
And they're sort of harmonically
resolving.
561
01:14:01,840 --> 01:14:05,000
There's tension, there's release,
there's tension, there's release.
562
01:14:05,000 --> 01:14:07,400
So it's almost like the heartbeat
of the music
563
01:14:07,400 --> 01:14:09,680
is just still slowly carrying on
564
01:14:09,680 --> 01:14:13,120
as it sort of disappears into the
universe. Yeah.
565
01:14:13,120 --> 01:14:18,120
CROWD APPLAUDS
566
01:14:18,120 --> 01:14:22,080
In summer 1989, Voyager 2 arrived at
Neptune,
567
01:14:22,080 --> 01:14:25,320
the true frozen outpost of the solar
system,
568
01:14:25,320 --> 01:14:28,120
a planet that's known as an ice
giant.
569
01:14:28,120 --> 01:14:32,840
It dwarves the Earth, but made, just
like Jupiter, Saturn and Uranus,
570
01:14:32,840 --> 01:14:35,960
primarily out of gas.
571
01:14:35,960 --> 01:14:41,680
It's still very cold, minus 220
degrees or so at the cloudtops.
572
01:14:41,680 --> 01:14:46,280
But Neptune produces some heat
internally,
573
01:14:46,280 --> 01:14:49,720
and so at some point as you
dive below the clouds
574
01:14:49,720 --> 01:14:52,320
and the pressure's increased,
there is, we expect,
575
01:14:52,320 --> 01:14:55,360
a zone where you could find,
perhaps, liquid water.
576
01:14:56,600 --> 01:15:00,080
Neptune is a world of violent winds.
577
01:15:00,080 --> 01:15:04,120
We saw high altitude
clouds as Voyager passed by,
578
01:15:04,120 --> 01:15:06,640
clouds of methane crystals,
579
01:15:06,640 --> 01:15:13,520
supersonic winds that
blow at speeds of up to 1,200mph.
580
01:15:13,520 --> 01:15:18,920
It has moons and the largest moon is
a moon called Triton.
581
01:15:18,920 --> 01:15:21,000
And this is so far away from the
sun,
582
01:15:21,000 --> 01:15:23,600
very little energy falls on its
surface.
583
01:15:23,600 --> 01:15:27,680
But we saw activity. We saw geysers
erupting into the air.
584
01:15:27,680 --> 01:15:30,920
Geysers of nitrogen, sprinkling dark
material
585
01:15:30,920 --> 01:15:33,360
down wind on to its surface,
586
01:15:33,360 --> 01:15:36,440
processes that we don't yet
fully understand,
587
01:15:36,440 --> 01:15:39,840
leaving streaks across the surface
of the moon.
588
01:15:39,840 --> 01:15:42,920
But as Voyager left
the Neptunian system,
589
01:15:42,920 --> 01:15:46,560
it took one of the most iconic
images
590
01:15:46,560 --> 01:15:48,280
in the history of space
exploration.
591
01:15:48,280 --> 01:15:51,360
I think, actually,
it's my personal favourite,
592
01:15:51,360 --> 01:15:55,160
and I think it enhances Holst's
music more than words.
593
01:15:55,160 --> 01:15:58,000
Crescent Neptune, and a moon Triton.
594
01:15:58,000 --> 01:16:01,800
A world of ice 230 degrees
below zero,
595
01:16:01,800 --> 01:16:05,240
orbiting a blue planet of storms.
596
01:16:05,240 --> 01:16:07,680
These two worlds remained unseen
597
01:16:07,680 --> 01:16:11,400
for four and a half billion years
after their formation,
598
01:16:11,400 --> 01:16:14,040
until our tiny emissary from Earth
599
01:16:14,040 --> 01:16:17,840
passed by on its way to
interstellar space.
600
01:16:17,840 --> 01:16:20,280
Now, I suggested at the beginning
of tonight's performance
601
01:16:20,280 --> 01:16:23,400
that I hoped new ideas would emerge
from the synthesis
602
01:16:23,400 --> 01:16:27,200
between Holst's music and the images
and scientific discoveries
603
01:16:27,200 --> 01:16:30,440
we've made since the first
performance of The Planets,
604
01:16:30,440 --> 01:16:36,120
precisely 100 years ago today,
on 29th September, 1918.
605
01:16:36,120 --> 01:16:39,160
And, for me, they have.
606
01:16:39,160 --> 01:16:42,240
There are billions of planets
beyond our solar system,
607
01:16:42,240 --> 01:16:47,120
orbiting around the 200 billion
stars in the Milky Way galaxy,
608
01:16:47,120 --> 01:16:51,760
and in the billions
of galaxies beyond.
609
01:16:51,760 --> 01:16:55,040
But we discovered that solar
systems and their planets
610
01:16:55,040 --> 01:17:00,360
are not necessarily, or even
perhaps, usually stable...
611
01:17:00,360 --> 01:17:03,760
..on the time scales necessary to
allow complex life
612
01:17:03,760 --> 01:17:06,200
and civilisations to evolve.
613
01:17:06,200 --> 01:17:12,080
So we, the human race, might be
extremely fortunate to exist
614
01:17:12,080 --> 01:17:15,760
and, therefore, we may be
indescribably rare,
615
01:17:15,760 --> 01:17:18,000
and therefore precious.
616
01:17:18,000 --> 01:17:22,440
I mean, imagine that there are no
other civilisations in our galaxy.
617
01:17:22,440 --> 01:17:26,080
There would then be no music
amongst the stars.
618
01:17:27,120 --> 01:17:30,560
Holst tells us through his music
that it's up to us
619
01:17:30,560 --> 01:17:32,200
how we navigate our problems,
620
01:17:32,200 --> 01:17:37,480
to choose HOW, or even IF we want
to undertake the journey
621
01:17:37,480 --> 01:17:41,760
from Mars to Neptune,
from war to enlightenment.
622
01:17:41,760 --> 01:17:45,360
His message is amplified,
I think, a hundredfold,
623
01:17:45,360 --> 01:17:48,240
by an understanding of our place in
the universe,
624
01:17:48,240 --> 01:17:52,120
an understanding of the fragility
and value of humanity,
625
01:17:52,120 --> 01:17:55,640
living as we do together on a small
world,
626
01:17:55,640 --> 01:18:01,640
accompanied by our seven planetary
companions adrift in the dark.
627
01:18:06,720 --> 01:18:12,080
MUSIC: Neptune, the Mystic
by Gustav Holst
628
01:26:02,640 --> 01:26:10,360
CROWD APPLAUD
54302
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