planets

For Astronomy lovers who would love to discuss about celestial objects.
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leonardo shawon
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planets

Unread post by leonardo shawon » Wed Apr 13, 2011 4:40 pm

Is there any PLANET which is not orbiting any stars or which is orbiting another PLANET..??
Ibtehaz Shawon
BRAC University.

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*Mahi*
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Re: planets

Unread post by *Mahi* » Wed Apr 13, 2011 6:57 pm

A planet (from Greek , alternative form of "wanderer") is a celestial body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.(from wikipedia)
So, I think it is clear that there is not any planet like you described.
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tanvirab
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Re: planets

Unread post by tanvirab » Thu Apr 14, 2011 12:47 am

Planets which orbit other planets are called satellite, example - the moon.

Sometimes satellites become planets and planets become satellites due to gravitation.

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leonardo shawon
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Re: planets

Unread post by leonardo shawon » Thu Apr 14, 2011 11:44 pm

gravitation কিসের উপর নির্ভর করে ?
Ibtehaz Shawon
BRAC University.

long way to go .....

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*Mahi*
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Re: planets

Unread post by *Mahi* » Fri Apr 15, 2011 12:54 pm

Gravitation is proportional to the masses of the objects and inversely proportional to the distance between their centers of gravity.......
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Abhijeet Dutta
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Re: planets

Unread post by Abhijeet Dutta » Mon Apr 18, 2011 7:31 pm

planets are just the remnant of a supernova or hypernova of stars.
gravitation acts more gently with the star and its orbiting planet and with the host planet and its satellite
but it becomes more gigantic when we talk about binary star systems which are most common ones in the known universe
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