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Asked by sekhar to Will on 14 Jun 2011.
Question: How did the earth formed?? Is it a star ?
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William Eborall answered on 14 Jun 2011:
Hi Sekhar. I’m not sure how the Earth formed – you’d need to ask someone with a more physicsy background than me – maybe James or David.
I can tell you though that the Earth isn’t a star, it’s a planet. The sun is a star.
Sorry I can’t answer you fully.
Comments
drfc commented on :
the earth started by the big bang
James commented on :
There’s a good movie at http://www.youtube.com/watch?v=-x8-KMR0nx8
The earth is thought to have formed long after the big bang (about 6 or 7 billion years ago, I read). Gravity causes particles of dust and material in space to slowly collect together over many billions and millions of years. This forms solar systems and planets. It’s not a gentle process – some of these bits of material are moving really, really fast and have lots of energy (kinetic energy).
alamin commented on :
Well on an episode of Doctor Who (called the ‘Run Away Bride’) the Doctor travelled all the way back to the big bang … and there was one BIG rock which had the most gravitational pull and pulled all the other rocks together to form Earth.
… Doctor Who’s just awesome.
James commented on :
yes, but that’s Dr Who! (which I do watch every week with my son!). The Earth wasn’t there at the time of the big bang, it joined the party later.
alamin commented on :
True … but still, Doctor Who’s awesome 🙂 … which is why I chose a ‘Doctor’ as my profile picture on I’m A Scientist 🙂