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Every planet and satellite revolves around their mother planet and about their own axis as we know. So they are compacted as a system. Then why not sun?

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  • $\begingroup$ The sun orbits the supermassive black hole in the core of the galaxy. $\endgroup$ – Kyle Kanos Apr 4 '14 at 13:42
  • $\begingroup$ I guessed so.Please sir,Can you tell me is this answer 'supermassive blackhole'is the name given to unknown body?The body may be another sun to another galaxy? $\endgroup$ – dipendra Apr 4 '14 at 13:51
  • $\begingroup$ The text "supermassive black hole" links to the Wikipedia article on Sagittarius A$^*$, our particular black hole. You may want to read the article about black holes, as explaining what it is will take more space than I have in the comment box. $\endgroup$ – Kyle Kanos Apr 4 '14 at 13:53
  • $\begingroup$ @dipendra no, a supermassive black hole is a black hole (a known entity in its own right) that is much more massive than your ordinary, uninteresting black holes $\endgroup$ – Jim Apr 4 '14 at 13:54
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    $\begingroup$ @Jim: I whole-heartedly disagree that "ordinary" black holes are "uninteresting." $\endgroup$ – Kyle Kanos Apr 4 '14 at 13:59
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Yes, the Sun and our whole Solar System are revolving around the centre of our galaxy, the Milky Way. Milky Way is a spiral galaxy and hence has four major spiral arms and a central buldge. The Sun (and, of course, the rest of our solar system) is located near the Orion arm, between two major arms (Perseus and Sagittarius).

Orion

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    $\begingroup$ I see 4 major spiral arms... $\endgroup$ – Kyle Kanos Apr 4 '14 at 13:49
  • $\begingroup$ Thank you parth.Is the centre of galaxy a rigid body or space? $\endgroup$ – dipendra Apr 4 '14 at 13:50
  • $\begingroup$ @dipendra neither. It is stars and gas and black holes and etc. Not a rigid body, and there is some space, but I wouldn't go so far as to say it is just space $\endgroup$ – Jim Apr 4 '14 at 13:52
  • $\begingroup$ As Kyle said, it is a single supermassive Black Hole. $\endgroup$ – user42733 Apr 4 '14 at 13:54
  • $\begingroup$ @dipendra the supermassive black hole is only about 1% of the mass causing the Sun to orbit the center of the galaxy. Other stars in the central part of the galaxy are the main source of mass. $\endgroup$ – DavePhD Apr 4 '14 at 14:06

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