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Author Topic: how does our moon know ?  (Read 2061 times)

Anastasia.fr.1

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how does our moon know ?
« on: 02/08/2007 10:55:27 »
how does our moon know just to orbit earth not other planits such as :mars and venus there close to us  [?]


 

Offline lightarrow

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how does our moon know ?
« Reply #1 on: 02/08/2007 13:17:51 »
how does our moon know just to orbit earth not other planits such as :mars and venus there close to us  [?]
Because Earth is much closer to the Moon than Mars or Venus.
 

Offline daveshorts

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how does our moon know ?
« Reply #2 on: 02/08/2007 13:46:19 »
The moon doesn't 'know' to orbit the earth it is just falling all the time. All the planets are pulling on the moon a bit but the earth is much closer than the rest of the planets (about a hundreth of the closest that Venus ever comes) and because the force of gravity reduces with the square of the distance, if venus is 100 times further away it's gravity will be 100x100 = 10000 times weaker.

This means that it is basically falling towards the earth all the time, but because it is moving to start with it always misses

For more about why the moon orbits the earth have a look at:
http://www.chaosscience.org.uk/pub/public_html//article.php?story=20040629175315124
which I wrote a couple of years ago.
« Last Edit: 02/08/2007 13:52:38 by daveshorts »
 

Offline syhprum

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how does our moon know ?
« Reply #3 on: 02/08/2007 22:47:11 »
This means that it is basically falling towards the earth all the time, but because it is moving to start with it always misses
I am relived to hear that I hope it remembers to keep going
 

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how does our moon know ?
« Reply #3 on: 02/08/2007 22:47:11 »

 

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