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2006-11-17 03:20:08 · 8 answers · asked by Anonymous in Science & Mathematics Astronomy & Space

8 answers

Stars don't move, the Earth does. What appears to be movement is the rotation of the Earth. The stars raise in the East and set in the West just as the sun and moon do.

If you were to draw a line out from both of the poles, the stars rotate around that pole. Polaris, the North Star, is the center of the pole and doesn't noticeably move. You can watch the other stars go around this, it is very noticeable in a time lapse photograph of the sky at night, you get many arcs centered around that point.

2006-11-17 03:32:59 · answer #1 · answered by Aggie80 5 · 0 2

Motion is relative. For example: To us on the surface of this planet, the Earth seems to be still. But if we looked at the Earth from a few hundred million kilometers up, we would see that it orbits the sun. So if you are asking if you are looking at the stars from the surface, the stars do not move. The rotation of the Earth causes them to appear to move. Like the Sun. It rises and sets because of the rotation of the Earth. Now, if you look at the stars from a different point of view and speed up time, you would actually see that the stars we see are actually moving around and moving towards the center of the Milky Way galaxy (the galaxy we live in). And on top of that, the Milky Way galaxy itself is moving. And on top of that, the universe is expanding. So you see, nothing is ever really stopped. Technically speaking, of course.

2006-11-17 03:34:36 · answer #2 · answered by gleemonex69 3 · 1 0

On top of the apparent diurnal motion of the stars due to the Earth's rotation, there is also "proper motion" of the stars relative to one another. This latter is relatively slow; the fastest moving ones will take many decades to move a degree. Most stars move at rates where it will take thousands of years to move a degree or so. This will slowly scramble up the appearance of the constellations familiar to us.

This motion is simply because all the stars are in somewhat different orbits around the center of mass of the Milky Way galaxy.

2006-11-17 16:16:52 · answer #3 · answered by Mr. Quark 5 · 1 0

Their nightly motion across the sky is for the same reason that the sun appears to move each day...due to the earth's rotation. Otherwise, they are all so far away that detecting their own motion relative to each other is barely detectable. However, they in fact all move around the center of our galaxy as the sun does at a rate of over 200 miles a second.

2006-11-17 03:54:51 · answer #4 · answered by Anonymous · 0 1

http://www-astronomy.mps.ohio-state.edu/~frogel/Ast161/outline161_a00_part2.html
First question: how do the stars appear to move in the sky. The Appearance of the Sky ... During a day, stars move in circles at a fixed distance from the ...www-astronomy.mps.ohio-state.edu/~frogel/.../outline161_a00_part2.html

2006-11-17 03:27:45 · answer #5 · answered by Anonymous · 0 2

a gazillion years ago there was this big bang (a major nuclear event). As far as eternity goes that was just a second ago, we're still in the middle of the explosion today.

2006-11-17 03:30:23 · answer #6 · answered by Anonymous · 0 2

They don't, the earth moves

2006-11-17 03:28:07 · answer #7 · answered by Anonymous · 1 2

ACTUALLY THE STARS FLY(NO GRAVITY) IN SPACE.
IT MOVES TOWARDS THE GRAVITY OF BLACK HOLES

2006-11-17 04:04:48 · answer #8 · answered by genius sonia 3 · 0 3

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