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Author Topic: Does the moon orbit the Earth, or vice-versa?  (Read 3565 times)

Offline Geezer

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Does the moon orbit the Earth, or vice-versa?
« on: 14/11/2009 18:22:44 »
Which of the following are true?

a) The Moon orbits the Earth

b) The Earth orbits the Moon

c) The Earth and the Moon orbit each other

d) The Moon is a really a fake. It's a giant helium balloon that NASA created after they accidentally destroyed the original Moon back in the sixties.
« Last Edit: 23/11/2009 09:01:00 by chris »


 

Offline Geezer

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Re: Does the moon orbit the Earth, or vice-versa?
« Reply #1 on: 15/11/2009 04:29:38 »
Ah yes! The Highland Skiteesh.

I guess you don't subscribe to my conspiracy theory then?
 

Offline glovesforfoxes

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Re: Does the moon orbit the Earth, or vice-versa?
« Reply #2 on: 15/11/2009 10:46:21 »
That really, the Moon is the centre of the Universe, and we're all orbiting it because it's made of Elerium-115?
 

Offline rosalind dna

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Re: Does the moon orbit the Earth, or vice-versa?
« Reply #3 on: 15/11/2009 14:19:19 »
The moon orbits earth and controls the tides as well.

But the Sun orbits earth since it's a Star
 

Offline RD

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Re: Does the moon orbit the Earth, or vice-versa?
« Reply #4 on: 15/11/2009 15:14:09 »
The description of the "X" in the diagram below should say something like "Combined center of mass".

or "barycenter".
« Last Edit: 15/11/2009 15:40:40 by RD »
 

Offline Geezer

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Re: Does the moon orbit the Earth, or vice-versa?
« Reply #5 on: 15/11/2009 20:58:29 »
But the Sun orbits earth since it's a Star

You are entitled to your opinion, but isn't that a bit "old school"?  ;D

Although, actually, it's true if you allow that two objects in orbit share a common point of rotation and therfore, they actually do orbit each other. I don't think the definition of "orbit" requires that the point of rotation has to lie outside either of the bodies - although, as is not unusual, I could be wrong about that.
 

Offline Geezer

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Re: Does the moon orbit the Earth, or vice-versa?
« Reply #6 on: 15/11/2009 21:05:35 »
That really, the Moon is the centre of the Universe, and we're all orbiting it because it's made of Elerium-115?
Wow! I had not heard that. Must be true if its on the NSF though.

Come to think of it, it might be quite difficult to prove that the Moon is not actually at the center of the Universe. For all we know, it could even be slap dab in the middle of Milton Keynes.
 

Offline Ophiolite

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Re: Does the moon orbit the Earth, or vice-versa?
« Reply #7 on: 15/11/2009 22:22:58 »
For all we know, it could even be slap dab in the middle of Milton Keynes.
That would explain stories that a cow jumped over it.

[For non-UK residents, Milton Keynes is famed for its excessive number of traffic roundabouts (irrelevant) and its concrete cows.]
 

The Naked Scientists Forum

Re: Does the moon orbit the Earth, or vice-versa?
« Reply #7 on: 15/11/2009 22:22:58 »

 

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