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Last by Evie on Nov 09, 2010, 10:05am
Physics is cool.
It turns out that in the big bad dark vastness of the ever expanding, contracting, and moving universe, you can find certain spots that are always at rest.
Well I mean that’s all relative. They’re at rest relative to more massive bodies orbiting in their vicinity.
Say you’ve got your Sun and you’ve got your Earth, and you’re a much much smaller object, like a satellite, or space telescope. Well as it turns out, there are 5 points in space, not too far from both those bodies, which if placed at, you would appear to be holding your position steady with respect to both those large bodies.
This means, that even though you’re in motion, the Sun is in motion, the Earth is in motion, and the rest of the galaxy is hurling toward the unknown, you will still be in very good company. Your Earth and your Sun will literally always be there. In the same exact (relative) spots.
I think that is pretty damn cool.
What you're seeing here is an animated sketch of the relative motion of the bodies in question. The big yellow ball in the middle is the Sun, the blue small one is the Earth, and the labeled green points are the 'parking spots'. This pic is from Wikipedia, . . . More