Posted by Shirley on Saturday, December 3, 2011 at 11:28pm.
(a) Milky Way photographs show a dark band running down the middle, with approximately equal numbers of stars on each side. That is the way it looks when the observer is near the central plane of the disc.
(b) A black hole has been inferred to be at the center of the Milky Way galaxy, based upon the the mass at the center as determined from velocity measurements of stars orbiting the center.
Try some of the fol lowing links for information:
1. http://www.google.com/search?q=Why+is+the+sun+considered+to+be+located+in+the+central+disk+of+our+galaxy%3F&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a
2. http://www.google.com/search?q=In+our+galazy%2C+What+is+thought+to+occupy+the+center+of+the+disk&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a
Sra
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