A question about the Sun
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A question about the Sun

[From: ] [author: ] [Date: 11-07-04] [Hit: ]
-Yes, thats me. A better place to ask questions about Starry Night is our Yahoo!http://tech.groups.yahoo.......
How long does it take, in solar time, for the Sun to return to its starting point?
Thanks

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About 220 million years. Those are _Earth_ years. It takes ONE solar year!

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Yes, that's me. A better place to ask questions about Starry Night is our Yahoo!Group:
http://tech.groups.yahoo.com/g…

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It takes about 220 million years for the sun to make one orbit of the galactic core. While orbiting, the sun also drifts up & down through the thickness of the galactic disk. It takes 130 million years for the sun to make one such pass, so you can see for yourself that after one orbit, the sun wont be in the same position where it started its orbit. Furthermore, the galaxy is drifting through intergalactic space all the while the sun is orbiting, so if you were to trace the sun's ever-changing position over the course of it's life, you would see that it's path resembles a wiggly corkscrew, never being in any position more than once.

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220 million earth years.
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