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The Infinite Frontier:Planet Earth (Astronomers believe that our solar…
The Infinite Frontier:Planet Earth
Astronomers believe that our solar system began in a swirling tempest of gas and dust
From this planets were made
To understand the other planets we look at the forces that formed and continue to shape the planet earth
The Hot Beginning
All planets including earth are formed by the collision of smaller bodies
They were all in orbit around the sun and collided with each other building the planets
This happened because the impacts eventually started to grow heated and formed liquid and created the insides of the earth
All the rocks have disappeared so there is no true evidence of the earth's existence of the first 1 billion year
Core- mostly liquid iron
Mantel- surrounds the core made of rock
Crust- thin layer on top of mantel
Has a large magnetic field
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