Original subtitles

how often do you think rocks falling

from space land on people only one case

in history has ever been officially

confirmed although others have been

reported on November 30th 1954 of four

kilogram or nine pound meteorite crashed

through the ceiling of 34 year old and

Elizabeth Hodges home the stone bounced

off the radio and hit the poor lady in

the thigh leaving a huge bruise the

probability of such a small meteorite

hitting a person is negligible but it

happened what if something larger fell

to earth for example the largest

asteroid in the solar system scientists

estimate that there are now several

hundred million asteroids one meter or

3.3 feet or more in size in Earth's

orbit every day about a hundred tons of

them in the form of small grains of sand

and small stones penetrate the Earth's

atmosphere and burn up leaving a bright

trail about 30 asteroids with a total

mass of up to 2,000 tons fly directly

towards Earth's atmosphere every year

occasionally their fragments fall to

Earth's surface in the form of

meteorites more noticeable meteorites

larger than 20 meters or 65 point 6 feet

fall to earth no more than twice every

100 years the last of these came down in

the Chelyabinsk region in Russia in 2013

once every thousand years objects like

the Tunguska meteorite which was about

75 meters or 246 feet in size reach the

Earth's surface asteroids measuring more

than a hundred meters or 328 feet land

here even less often once every few

thousand years the most gigantic

asteroids whose dimensions exceed

kilometers or miles crashed down onto

our planet once every 100 million years

but in this case they become the cause

of global catastrophes in the extinction

of species one of them probably

destroyed the dinosaurs 65 million years

ago if there were no wind rain and

various geological processes on earth

our entire planet would be dotted with

craters as can be seen on the moon or

mercury

the remaining traces of space objects

confirmed that asteroid impacts are not

a fantasy at all the arrival of large

stones remains only a matter of time

scientists consider asteroids at least

140 meters or 460 feet in size as the

most dangerous at the same time they're

mostly located no further than 7.5

million kilometers or 4.6 million miles

from the earth however it's very

difficult to notice them after all they

often clearly reflect sunlight have a

flat shape and fly at a speed of 36,000

kilometers or 22400 miles per hour for

individual asteroids the speed can be

noticeably higher therefore even the

most powerful technology is far from

capable of stopping all of them in time

one of the most dangerous candidates

will approach earth in October 20 28th

1997 xf11 could fly past our planet at a

distance of nine hundred thirty thousand

kilometers or 580 thousand miles away

this is so close that you could watch it

with ordinary binoculars the size of the

asteroid according to various estimates

ranges from 700 to 1400 meters that's

2,300 to 4,600 feet scientists claim

that it's going to happen suppose

something goes wrong and it changes its

course straight for earth the collision

speed of such a block with the surface

of the earth would be about 48,000

kilometers or

thirty thousand miles per hour this

would create an explosion of 1 million

Megaton it's hard to imagine such a

figure imagine that it partially burns

out in the atmosphere or is divided into

smaller fragments if an asteroid

fragment the size of a one-story house

crashes into earth at the same speed if

power will be approximately comparable

to the bomb detonated in Hiroshima about

20 kilotons such a collision would raise

every reinforced concrete building

within a radius of 800 meters or 2,600

feet from the impact of the asteroid

everything made of wood within radius of

2.4 kilometers or one-and-a-half miles

would be destroyed if the length of the

Fallen asteroid is comparable to a

20-story building and is a little over

60 meters or 200 feet wide the impact

power will be close to the explosions of

modern nuclear bombs that is

approximately 25 to 50 kilotons this is

enough to incinerate every reinforced

concrete structure within eight

kilometers or five miles from the point

of impact consequently all living things

on the site will also perish in the

event that 1997 xf11 falls to earth as a

whole the power of the explosion will be

50 million times the power of the bomb

detonated in Hiroshima everything within

a radius of a hundred and sixty to 320

kilometers or 100 to 200 miles will turn

to ashes

if the epicentre were for example in New

York City then from Boston to Washington

DC there would not be a single tiny

living life-form remaining with the

exception of super resistant bacteria

the explosion will raise a huge amount

of dust into the atmosphere forming

clouds that will block sunlight from the

Earth's surface they

for anyone who survives is likely to die

from a sudden cold snap if such an

asteroid hits the ocean it will create

enormous waves more than 30 meters or

100 feet tall that will wash away

everything on the nears coasts this

asteroid is only one of the few

potentially dangerous objects that could

destroy life on Earth the largest and

most dangerous is Series in 2006

scientists changed its status from

asteroid to dwarf planet Ceres has a

diameter of about 945 kilometers or 587

miles

Discovery Channel employees created an

animation showing the effects of a

collision between Earth and Ceres

according to their video first a shadow

of the impending object would block a

fairly large area of Earth from sunlight

when it reached the atmosphere the

asteroid would begin to burn then Ceres

would penetrate deep into the planet

creating enormous tsunamis

the force of the collision would be so

powerful that fragments of our planet

would fly straight into space but they

would not remain there for long the

resulting stone fragments would rain

down on every area of our planet the

Himalayan mountains including the peak

of Everest would be completely burned

and turned into a plane it's unlikely

that anyone would be able to survive on

earth after such an impact fortunately

in the near future a clash with Ceres is

unlikely however this hypothetical

experiment shows how fragile and

vulnerable life on Earth is according to

scientists from NASA to destroy all life

on the planet a 10 kilometer or 6.2 mile

asteroid is enough that is almost 95

times smaller than Ceres

a collision with a large asteroid will

happen sooner or later researchers

regularly searched for ways to avoid

such a catastrophe the best way to do

this is to change the trajectory of an

asteroid or destroy it in space before

it reaches us for these purposes

NASA together with SpaceX planned to

launch the Darden spacecraft

its mission is to collide with the moon

of the didymus asteroid which in October

2022

will be several million kilometres from

Earth dart weighs 500 kilograms or 1,100

pounds and measures 12 and a half meters

by 2.4 meters or 41 by 8 feet the

diameter of its moon is about a hundred

and 50 meters or 500 feet scientists

calculate that the spacecraft and the

block of stone will collide at a speed

of 6 kilometers or 3.7 miles per second

this will allow them to determine

whether a small collision can affect the

orbit of an asteroid in any case the

main thing is that after this experiment

didymus and its moon will not be heading

towards Earth because their trajectories

are currently not in line with our

planet in truth for each of us the

chances of dying from an asteroid are

pretty small they're even smaller than

the probability of getting struck by

lightning amounting to only one in

280,000 but these statistics apply to

the individual if we talk about the

planet as a whole

then the hazard coefficient increases

asteroid 2010 RF 12 has the highest

chance of colliding with earth one in 16

it could come within 8.7 thousand to

15,000 kilometers or 5,400 290 300 miles

from the earth and in 2095 it could even

crash into our planet fortunately it's

not large enough to lead to global

cataclysms however there are still many

other giant boulders in space flying

past earth at a dangerously close

proximity

in your opinion will technology be able

to fully protect us from collisions in

the future let us know in the comments

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