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Asked by Dragoscience to Jonathan, Kellie, Kevin, Melissa, Stephanie on 27 Apr 2016.
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Melissa Wilson Sayres answered on 27 Apr 2016:
I study evolution, which requires that we have life. The formation of the earth is much, much, much older than the origin of life on earth, and so much, much, much older than what I study.
BBC earth has a good explanation of the timeline of the formation of earth (http://www.bbc.co.uk/science/earth/earth_timeline/earth_formed).
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Kellie Jaremko answered on 27 Apr 2016:
Another great description and link by Melissa! I do not study this but it seems to have been a result of gravity forming balls of dust/rock/gas/matter that grew over a long period of time to form planets. Here is another good description from The Guardian: https://www.theguardian.com/science/2008/apr/28/starsgalaxiesandplanets.geology
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Jonathan Jackson answered on 27 Apr 2016:
Melissa and Kellie have offered excellent answers to this question. But thinking about how the earth formed from the leftover bits that were used to form the sun is one of my favorite non-Alzheimer’s things to think about. What a fascinating process.
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Kevin Baker answered on 28 Apr 2016:
Melissa’s answer is good, I will add that some people think of it like this: After the big bang (a huge explosion by an unknown cause), a lot of materials were floating around space, slowly these materials came together to make spheres, these spheres eventually got gravity. This gravity pulled in more materials and you have a planet.
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