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SUB BY : DENI AUROR@ https://aurorarental.blogspot.com/

We saw the movie, a huge asteroid heading towards Earth.

Collides with the atmosphere, crashing into the surface.

To send a massive fireball, a deadly shock wave.

The earth groanes dying.

But this is not one of those films It is about how to repel Earth and humans.

To stop the end disaster.

The ways the universe works.

Planet earth.

The cradle of life, floating comfortably through space.

Or so we think.

Our planet may be the toughest spots in the universe.

Think about the natural disasters that have happened to humanity.

Earthquakes, volcanoes, hurricanes and the like.

We cannot stop it.

But the asteroid, that's a disaster Huge natural we can prevent.

When do people hear the word �asteroid�? These fantasy movies about the dangerous asteroids that hit us.

The story of the reason for the extinction of the dinosaurs.

There are, of course, some dangerous asteroids.

When it comes to searching for asteroids And defend the Earth, the scientists are the heroes strongly.

Across the world, Hama teams search The planet finds ways to prevent disaster.

... they wipe the sky.

... they do the math.

... are designing technology.

They make plans to confirm that extinction The planet from space is nothing more than science fiction.

If you want to face an opponent You need to know a lot about him to defeat him.

Its size, strength, and what is composed and how it moves, on us Knowing the same things about asteroids if we wanted to defeat them.

To better understand this discount.

Cathy Plesco from Los Lab Alamos National by traveling to Arizona.

Fifty thousand years ago, this was a point Collision leaving a crater approximately 550 feet deep.

This is a meteor crater.

It is amazing to stand on the edge of a crater Like this and I see the size of something as big.

I feel young and trying to understand the amount of energy Necessary to break that huge amount of rock.

The meteor that made the crater hit the force of a hydrogen bomb.

But it was a space rock Just thirty feet wide.

The meteor crater helps to understand how it is performed Speed ??turns a small shell into a killer.

The asteroid came at a speed of 27 thousand miles per hour.

It's ten times the speed The bullet fired from the gun.

It hit the surface and exploded.

This blast broke the crater.

The collision transformed the surrounding solid rocks To dirt, send a massive shock wave rushing out.

The wind here is stormy but incomparable Shock wave of impact.

Whoever is close will see winds of about thousands Miles per hour when the shock wave came.

Scientists have concluded that there is 20% chance of such a collision on Earth every century.

If an asteroid hit us today, it would uproot a city.

But Kathy�s research helps us strengthen our defenses.

We believe there are various ways to prevent An asteroid from hitting Earth.

My colleagues and I are in "Los Alamos, Livermore and other places.

We use computer models on computers Ultra high-performance simulation.

Good ideas tell us whether or not We can present it to decision makers.

Here is what we might do by comparison With what Bruce Willis could do.

The most powerful weapon in our defensive arsenal is the nuclear bomb.

Blasting the asteroid in this way has the disadvantage.

He risks raining the ground with hundreds of smaller meteors.

But Cathy works On plans to avoid that risk.

On the other hand, they use weapons Nuclear to change the course of the asteroid.

Someone is studying nuclear deviation.

In some cases and in the near future it may be There is a possibility that we need to block a huge object through us.

And those things, if they were huge, were lost We need to use a nuclear weapon to do this.

We may launch and detonate a nuclear weapon Above the surface of the body, to slightly change its velocity.

Nuclear weapon detonation near an asteroid Vaporizes part of its surface and changes its path.

But detonating a nuclear weapon in space is not the first option.

There are some advantages and disadvantages to using nuclear deviation.

There are some situations where that is The right technology and the only option then.

But we hope that in the future we will have other means At our disposal, it is not difficult diplomatically or politically.

Scientists are racing to find a way to change course Asteroid without using nuclear weapons.

We discover and understand more and more about asteroids.

We realize that there are ways to reduce it The devastating effects of hitting the ground.

This may be the most important attempt Scientific carried out by humans.

The best way to stop asteroid disaster Get rid of it before it becomes a threat.

Our solar system is dangerous.

Fast asteroids rush through space.

Many of those rocks get in our way.

To resist the asteroid threat Scientists draw up battle plans.

The first step to understanding this danger And stop him is to search for her.

Not the big one that could destroy our civilization But the little one that might destroy your city.

At the top of the mountains in Our Catalan to Clear the Sky in Arizona.

The asteroid hunter "Craig Leonard "led the search.

We are the guards of the world that night With this telescope on top of this mountain.

Comparing four pictures of the same patch from the sky Which was captured over twenty minutes.

Craig can track asteroids Hidden interstellar.

Because in those pictures no The stars move, but the asteroids.

If it were a bright asteroid we would see points Shiny light shines through the four images.

You must try a lot before finding One of them, and this is how it is every night.

Here we are, it is a real body.

You can see him moving across the sky Here from bottom right to top left.

I'm cheerful to discover an asteroid tonight Because it is an object very close to Earth.

Craig's research reveals that this asteroid has a hundredth A foot may approach 630 thousand miles from Earth.

This is less than three times the distance to the moon.

And in the future this orbit may be approaching The asteroid from Earth even to a collision course.

If this happens, we must prepare for it.

The more we spotted it, the sooner We have a better chance of changing course.

The space is very roomy and the floor is very small.

If we detected the asteroid from afar.

We slightly changed its course with a slight pinch and correction. A slight pathway:when it reaches the Earth's location, it will completely destroy us.

To do this, we have to change the asteroids off course.

Imagine golf, changing course The one-degree ball loses the target completely.

Measure it on asteroids.

Over time, you can leave Asteroids track in the asteroid belt.

To become dangerous objects near the Earth at a distance Thirty million miles may hit our planet one day.

But if the planet�s protectors could change The path of the dangerous body is one tenth of a degree.

You will avoid the ground completely.

Scientists have devised a straightforward way to do this.

In football, if defenders see the back The back runs towards the finish line, so what do they do?

They collide with him, push him off the field and drop him.

This is what we want to do with asteroids.

If we send something moving towards the asteroid quickly, Great for hitting it, we call it kinetic jumper.

He hits him hard, and doesn't change speed Not only the asteroid, but also its path.

Scientists have already made an objection Asteroids-like objects in space.

2005.

The Deep Impact vehicle has arrived Temple-1 is guilty of half the size of Manhattan.

The vehicle launched a probe small on the comet like a projectile.

She hit "Temple-1." Like a shell to detonate materials from the surface.

The search continues with kinematics.

In 2022, a vehicle called Dart will collide With an asteroid at a speed of about 13,000 miles per hour.

Transmission of that driving force It will change the asteroid�s speed slightly.

Perhaps part of an hour.

But over the course of a decade, this change in speed, even though it was little, will work To change its position to a large degree enough to avoid the Earth completely.

Hitting a huge space rock To change its course may seem unusual.

But astronomers have discovered that this happens a lot in space.

If there is a traffic jam on a highway and a lot From lane changes, collisions will happen sooner or later.

This happens in our solar system as well.

The asteroid belt is very crowded.

Asteroids hit each other at relative velocities, which are close to several Miles per second, and when that happens, sparks fly.

If we started with two asteroids and collided Suddenly, they produce ten asteroids.

That ten will collide with each other again to produce a hundred asteroids.

These asteroids will hit each other to produce thousands And millions and billions of potential jams to the ground.

But that war is not just a game of numbers Because asteroids do not all consist of the same substance.

We will need different weapons for each type.

Across the world, planet protectors are developing arts Fights to protect us from a large asteroid collision.

But there are millions of asteroids in the system Solar and all of them represent a danger of some kind.

Its speed, size and distance from Earth helps determine the degree of danger.

The more we talk, the greater our understanding of the asteroid We were better equipped to be able to defeat him.

It is the issue of knowing the enemy.

We need to know something about their properties Crime let us keep the danger out of our way.

But scientists realize that synthesis The asteroid may be the most deadly factor.

Knowing the composition of the asteroid will help us Looking for weakness in her shield.

Marina Brasovich from the Center for Near Eastern Studies The Earth uses technology developed during World War II.

Radar.

Planetary radars are very similar to airport radars.

Airport radar also tracks Planes we are tracking down asteroids.

That is hundreds of thousands away from us And maybe millions of kilometers.

Radars also tell us Also what this asteroid looks like.

We want to know its size, shape and chemical composition.

Given the details that we see On the roof and under-transmission of vehicles.

This cannot be achieved, so it is counted Radars are our space mission.

Radars show that asteroids may form Of rocks or minerals or a mix between them.

This is important information for how we deal with it.

Metal asteroids are much denser From the usual rocky asteroids.

Collisions from a huge iron asteroid might generate energy Much more than just a rocky asteroid the same size.

It also caused the metal shell Damage greater than a rock of the same size.

Metal asteroids may be More deadly than rock asteroids.

Scientists have now discovered that most asteroids are less similar With metal shells, I resemble the cosmic bullets a lot.

Most asteroids are not an object One compact and even aggregates of gravel.

It consists of many smaller rocks Gravel, grains and parts of sand.

All of them bind gravity together tightly.

Gravel asteroids, such as "itkawa" in the form of a pill Beans may have formed violent collisions between asteroids.

Initially rocky scatterers scatter Such collisions are as fragments.

Then the gravity that controls each other Rocks tie them together again without tightening.

The structure of the asteroid asteroid represents A huge challenge for our planet protectors.

How can science heroes be Save us from a pile of stones?

If the body had a solid mass of metal it would respond to collision or Blast in a completely different way than if it were piles of gravel.

They are linked together by gravity without tightening.

They are very fragile bodies and need special considerations.

We cannot necessarily collide with it.

Colliding with gravel asteroids It is like scattering a pile of leaves.

Thousands of smaller rocks will push in every direction.

It will not be monitored or predicted and you may continue to rush towards us.

But we have a plan.

Instead of using brute force We can use a slight gravitational pull.

Instead of this clumsy approach to hit and get away We just need something more careful and more precise.

And here is where the gravity locomotive comes.

Piles may be rocks Small but attractive.

For example, if we send a probe that has a mass of tons, it would be It has attraction too, not so big, but it does exist.

If we bring it closer to the asteroid, we can use gravity Mutual, attraction between them, to flatten the asteroid into a safe orbit.

All we need to park a vehicle Next to the asteroid and hover over there.

And don't let the asteroid and spacecraft pull together.

And let the vehicle's gravity work As a rope to pull the asteroid off its path.

It may sound like a science fiction, however That physics is simple and we can do it.

But the gravity locomotive only works if We tracked the movement of those asteroids precisely.

The problem is having a giant Complex in the middle of our solar system.

the sun.

Planet protectors want to stop the end disaster.

Their mission is to protect the earth from collisions Asteroids that seem inevitable.

But to do so, they need to predict all their steps.

In an ever-changing solar system, this is not easy.

We measure their orbits and can draw Maps of their orbits as we see them today.

But we know that it is not a fixed group, but a moving one Things are constantly changing in the asteroid belt.

Asteroids are not just about size Understanding density, orbit, and speed until we deal with them.

Collisions may work to develop Asteroid furrows in new orbits.

But there is another factor, gravity The colossal gas giant Jupiter.

Jupiter is the largest body in the solar system.

He sits outside the asteroid belt.

Its gravity can pull those asteroids And make their orbits more oval.

To send it toward the sun, crossing the Earth�s orbit.

Simulate Jupiter's impact on millions Asteroids are very difficult.

Now add some effect The largest collars in the asteroid belt.

Rocks three hundred miles wide Like Vista and Palace.

The difficult task becomes almost impossible.

But gravity is not force The only ones to make orbits mess.

This is a "pino" asteroid, and there is an opportunity In the year 2700 he hit the ground.

But the Pino orbit is constantly changing.

In the past 18 years, acute Its path is more than a hundred miles.

And the sun may be the culprit.

What can change the orbit of an asteroid?

It's easy to think that those are huge rocks Some of them are pulling together, attractively.

But would it be the most powerful effect? Because of something as slight as sunlight?

Its effect may be very slight.

But sunlight on our bodies exerts a slight pressure.

The fact that one of your sides is hotter From the other it is a batch that may move.

Sunlight consists of bundles A small amount of energy called photons.

When photons collide with the asteroid, they are transported A small amount of driving force and heat.

Imagine this situation here.

Here is our asteroid.

It may really be a showcase Ten miles or miles or the like.

Here is our asteroid, and here is the sun.

The asteroid revolves around the sun in this way.

This face heats up from The asteroid is caused by heat from the sun.

Here the back face is Because the cold space is cooler.

I really feel it with my own hands.

The warm face that draws light from the sun restores it Distribute that heat in the infrared spectral segment.

All of this radiation is from infrared The side of the asteroid somehow acts as a rocket motor.

He pushes the asteroid.

This is known as the Yarkovsky influence.

It is a slow process.

The asteroid is propelled with equal force Weighed a few grapes on the ground.

But when Pino turns Around the sun, it heats one side.

What drives it to a different orbit.

Yarkovsky influence is a problem.

If gravity alone affects those asteroids We would have expected the location of all asteroids and planets.

We got to know the course of that Asteroids for many years to come.

But this changes with the influence of Yarkovsky In a way that makes it difficult to predict.

It depends on the extent of the opacity The asteroid, even though it rotates and what its shape is.

It makes the orbit of the asteroid difficult Prediction in the distant future.

The Yarkovsky Effect makes movement predictions Asteroids like "Pino" are more difficult.

But the protectors of our planet are adept.

And they try to use the Yarkovsky effect To create a new weapon in their arsenal.

Know that the effect of Yarkovsky It changes the orbits of asteroids a lot.

It is an effect that we can use To move the asteroid by ourselves.

If we could change the way the sun warms the asteroid Change its color or change its shape to heat in a specific way.

We can change its orbit in this way.

If scientists could send Satellite to the asteroid.

He can use black paint or White to increase or decrease the heating effect.

But at the University of Southern California.

A team of scientists is working on a high-tech solution.

They want to outrun the influence of Yarkovsky Using a space laser called "D-Star.".

Imagine seeing an asteroid heading towards Earth.

We can use a space laser to hit the asteroid.

We vaporize the surface material that is Turn into a rapidly expanding gas.

This works as a missile so we can use it To push the asteroid onto a safer path, too.

Space lasers are another powerful weapon for Hama Our planet who are fighting asteroids.

It joins the gravity locomotives.

Kinematics.

And nuclear weapons in the arsenal.

But there is a big problem.

All defense against asteroids That we mentioned is technically possible.

The scary problem is that it is not ready yet.

It is not time to stop the end catastrophe yet.

We have made a lot of progress, especially in The past few years, but we haven't achieved it yet.

But we may reach that stage Maybe after ten or fifteen years.

But do not be afraid.

The Earth has a built-in defense that can burn Asteroids before they even hit the surface.

Arizona.

June 2, 2016.

A five-foot-wide rock rushing towards the ground.

It moves at a speed of about forty thousand miles per hour.

As it rushes over the heads, it illuminates the sky.

Early in the morning, an asteroid exploded with a shell The Earth quickly far exceeds the shotgun.

There was a fireball lit up Red rocks around us at night.

It was shiny enough to burn NASA machines to photograph on Earth that we used to observe fireballs.

The asteroid was seconds away from Collision and major damage seemed inevitable.

But the asteroid did not reach the surface, why?

We have a natural inhibitor against shocks At least the small asteroids.

And let me allude to you.

The air around us appears thin It repels a danger from space.

But the atmosphere is actually Another line of defense in front of asteroids.

One day he will be able to protect our planet From saving us from asteroid strikes.

But then, we need to count ... on the built-in ground defense system.

Atmosphere.

We know for a fact that our atmosphere acts as a protective shield.

Because asteroids come to Earth every day.

Some are small, some are slightly larger.

But what happens is when you enter the atmosphere At high speed, the friction burns.

Although the upper layers are thin, It is extremely dense in comparison to the vacuum of space.

When rock asteroids rush through the atmosphere.

Friction and air pressure heat it up To more than 3000 degrees Fahrenheit.

The larger the asteroid, the longer it takes to burn.

For those huge rocks The effects can be significant.

If there was a big rock in it It suffices, do not burn quickly.

We call it the explosive meteor, and when the meteor falls across The casing makes a great show we call it Fireball.

In February 2013.

Chelyabinsk in Russia was hit by a fireball.

When a space rock went off 60 feet across the sky.

This asteroid was bigger than a school bus.

And it sped off eleven miles per second.

It was heavily heated, disintegrating into small portions.

Then those parts penetrated the atmosphere.

When all that kinetic energy is transferred For that rock to light and heat it exploded.

The meteor "Chelyabinsk" is the largest natural body has ever been Seeing him enters the atmosphere for more than a hundred years.

It exploded twelve above the ground Miles of thirty nuclear bombs.

The explosion caused one thousand five hundred Injured and damaged seven thousand buildings.

If the protective shield does not exist for our cover The results would be worse.

The problem is that the cover will only protect us From rocky asteroids and rubble heap.

Up to about a hundred feet wide.

And there is something more dangerous to bear in mind.

Metal asteroids.

If we were hit by a rock asteroid or Pebble will not reach the ground.

The asteroid is one hundred feet wide It almost explodes in the sky.

If a metal asteroid collided with us a hundred feet wide.

It will not warn us in the first place.

It will hit the top layer Then it hits the ground a second later.

To cause a massive explosion It creates a nozzle approximately one mile wide.

Buildings will be razed to the ground and millions die By the shock wave propagating.

A layer of dust falls again on The next minutes and hours.

The metal asteroid penetrates into the atmosphere.

Difficulty to make friction And compress the air completely.

It hits the ground in a catastrophic explosion.

Metal asteroids may be The deadliest enemies of the planet�s protectors.

But it is clear that the Earth has another compact defense.

We know that an asteroid penetrated the atmosphere and annihilated dinosaurs.

But research shows that our planet may have saved it.

Dinosaurs were totally unlucky.

Even if the asteroid broke through our cover We still have a line of defense.

The composition of the asteroid is not always the difference.

Sometimes it comes to where he hits you.

Our planet�s protectors are creating technologies To change the course of a catastrophic asteroid.

But until their arsenal is complete The Earth has its own defense methods.

One of the sure things is that an asteroid or asteroid will shock us.

Maybe it will not happen for millions of years, but it will happen.

On this day, what will differentiate between that It is a hard day or a global catastrophe.

Its location, location, location.

Some regions of the Earth can reduce From the damage caused by the deadly asteroid.

How do we know that?

Dinosaurs.

65 million years ago.

The luck of the dinosaurs was bad, it was They were lucky to be annihilated by an asteroid collision.

We thought we knew the whole story.

But the researchers showed something amazing.

If the asteroid hit the Earth just minutes later Dinosaurs would still roam the Earth today.

but how?

This body collided On the Yucatan Peninsula.

The latest giant tsunami flooded North America.

But he also threw a lot of sulfur in the air.

Land the asteroid with a width Six miles in shallow seas.

Which is now the Gulf of Mexico.

He evaporated rocks on the sea floor of the continental shelf.

The collision detonated trillions of tons From gases to the atmosphere.

To provoke a catastrophic climate change.

He would have been in the deepest ocean and would not have produced it All these evaporated rocks and sulfur.

Our planet rotates at a thousand miles per hour.

Oceans cover seventy percent of the Earth's surface.

With some luck, I hit a destroyer Dinosaurs with deeper water.

There is no good place on the ground that could blow An asteroid five miles wide, there is no good place.

There are spots worse than others.

And the Yucatan peninsula is this much Sulfur was the worst possible place.

It was not a good day.

The asteroid that killed the dinosaurs was allowed Ours - mammals - dominate the Earth.

Fortunately, those asteroids are hitting Giant once every few million years.

But every 2000 years, you make a rock of a size A soccer field crashing to the ground.

What happens when one of these asteroids does Smaller common colliding with the ocean?

If you envision the Pacific Ocean, there is a long coastline.

Thus there are many people at risk.

Most of the Earth's surface is oceans.

The possibility is that the asteroid will crash into the ocean.

The question is how dangerous is the resulting tsunami?

Scientists have simulated what would happen if An asteroid collided with various regions of the ocean.

Study in 3D with different types of structures And different depths of the ocean and different entry angles.

And we realized that the continental shelf was already saving us.

The continental shelf is an underwater ground block It stretches nearly fifty miles off the coast.

When an asteroid hits a width Hundreds of feet deep into the ocean.

The shallow sea made by the continental shelf The tsunami may weaken before it hits land.

It looks like the ocean has our defense.

As for the depth of the ocean, we think it's the smallest asteroid 400 feet wide, which is large, will not cause a tsunami hazard.

No need to worry as we were worried about him.

This shallow part of the water Dilute any upcoming tsunami.

So our planet has defensive mechanisms.

Our scientists devise plans to transfer the confrontation to asteroids.

They only need time.

Astronomy can save the world because we are observing All the asteroids that might hit Earth one day.

And if we find it, we can Avoid the annihilation of civilization.

If we have a warning time we have Advantage of being able to think about the problem.

Planning and building technologies.

And training in the required technologies To push this asteroid through us.

Time is our ally.

We are not ready to prevent the end disaster yet.

But by taking on the protection teams of the planet The case we have a chance to fight.

If you want to know the worst nightmares Astronomers would be an asteroid collision.

It is personal.

It happens here on the ground.

It is a challenge for us and for this we want to prevent it.

The good news is that we are on the cusp That we can change course.

Once we get there, we have to go ahead.

The planet is very flexible.

Even if there is a weak or A weak person, the whole earth is strong.

It is up to us humans to be our will to discover, explore and understand the Solar System.

It becomes important when we think about asteroids.

We have to keep wiping the sky, though Scientists stayed until we defended the Earth.