2007-01-10 05:10:01 · 5 answers · asked by my_band_76 1 in Science & Mathematics ➔ Astronomy & Space
sudden abrupt repetitive and boring
2007-01-10 05:23:32 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Moons revolve around planets. Planets revolve around stars. Stars revolve around galaxies. Galaxies mostly try to get away from each other. Most of these things rotate because the chance of any object being perfectly still is vanishingly small and spinning is a form of inertia. The revolution of most of these systems is fairly simple, controlled by gravity, mass, position and existing orbital energy. Galaxies are a little more complex, since there are so many components at different positions, but the forces are the same.
There are still a few mysteries out there, like "dark energy" which currently appears to be a form of anti-gravity, but for the most part, gravity is the major operator here.
2007-01-10 05:37:35 · answer #2 · answered by skepsis 7 · 0⤊ 0⤋
Basic motions of celestial objects include:
Rotation: spinning on an axis
Revolution: following an elliptical path (orbit) around another object
Expansion: galaxies are getting further and further from one another, as evidenced by red shift
2007-01-10 05:36:58 · answer #3 · answered by Jerry P 6 · 0⤊ 0⤋
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2007-01-10 05:39:38 · answer #4 · answered by Yahoo Answerer 4 · 0⤊ 0⤋
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2007-01-12 05:22:43 · answer #5 · answered by ? 2 · 0⤊ 0⤋