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the solar system formed from a large rotating cloud of interstellar dust called the solar nebula.It was composed of hydrogen and helium created after the big bang 13.7 years ago.
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In the outer part of the nebula gravity caused matter to condense around density pertubation and dust particles, and the rest of the eath formed in the manner about 4.54 billion years ago and was complete with in 10-20 million years.
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the moon formed 4 billion years ago when another planet crashed in to earth and tilted the earth and the moon was cought in the earths gravity and is orbiting the earth. this happend about 70-110 million years after the start if the solar system.
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the first fossils were found 3.5 billion years ago.
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first hard shell animals were formed about 0.6 billion years ago.
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Dinosuars were formed about 0.3 billion years ago
