Name: 宇宙和太陽系（第六季）｜歷史 (ASTEROIDS AND THE SOLAR SYSTEM | The Universe (Season 6) | History)
Uploaded: 2021-01-14T10:21:39.000Z
Duration: 5 min 30 s
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the making of our solar system reaches a violent climax 700 million years after the pre solar cloud first began to collapse and Earth is in the firing line.

Gravitational chaos of Jupiter and Saturn is battering the inner solar systems, planets and moons in an event now known as the late heavy bombardment.

A lot of the material in the outer solar system, these comets fell in towards the inner solar system where they collided with the inner planets moon creating the craters that we see today.

Some researchers believe collisions may have repeatedly sterilized the Earth and that if life had formed, it was wiped out and had to start anew.

But the impact of objects from space, along with their violence, may have also brought a benefit.

The Earth might not have all the water it does today.

Had it not been bombarded by material from the outer solar system.

Some have speculated that much of the water we have on earth is actually a result of impacts from the late, heavy but Martin period.

Today, 4.6 billion years after the solar system's birth, the ongoing if remote danger of a massive asteroid strike means the story is not over.

More important, though, are the hundreds of tiny asteroids hitting the planet as meteorites.

Studying them tells us that the making of the solar system really happened when and how we think it did.

I'm holding a sample of the Allende meteorite.

The ending meteorite is a fragment of rock that fell in Mexico near the village of Allende in 1969.

One of the components of the media writer, these calcium, aluminum rich inclusions, these white objects that you can see on the surface.

These are the oldest known materials in the solar system, and we know this by age, dating with radio genic isotopes in his high tech lab at U.

Cosmo, chemists Ed Young and his colleagues carefully examined tiny samples of ancient meteorites.

There's a big white fragment in the middle, which we want to cut out.

The lab's precision lasers aim at the fragments, blasting out holes no wider than a human hair.

Sophisticated analysis measures radioactive elements, which serve as atomic clocks.

In early 2011 Cosmo Chemists in a similar lab at Arizona State University dated part of a North African meteorite to an incredibly accurate 4.5682 billion years old, the oldest material ever found on Earth older than the planet itself.

The most important reason for understanding how the solar system was made was to find out whether or not we're normal when you look out and look at other solar systems being made with our telescopes today, for example, in Ryan and Other Places way Want to answer the question?

Launched in 2009 the Kepler mission has identified 1200 possible planets around other stars.

Some systems have Jupiter sized planets close to their sons or in lopsided orbits.

Others have only small planets crowded closely in the hot zone of their stars.

Our solar system, however, has its planets in near circular orbits spread out in a stable arrangement that seems almost too perfect.

One of the great surprises of the last decade as we started to discover other planetary systems was the fact that our solar system seems to be one of the oddballs, most because our own solar system is so regular is the solar system made by processes that we can observe going on today or we somehow special.

This goes to the point whether or not life is special.

 And that question is perhaps the most important one of all as the life story of the sun and its planets essentially becomes the life story of life itself, humanity on Earth and our ultimate place alone or among many in the universe. 

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宇宙和太陽系（第六季）｜歷史 (ASTEROIDS AND THE SOLAR SYSTEM | The Universe (Season 6) | History)

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