History of the Universe

History of the Universe eBook. 398 pages, 300 illustrations only $2.99

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Nucleus of Galaxy

Now letís look at the main parts of our Milky Way galaxy.

At the centre of spiral galaxies there is a central bulge or nucleus containing old stars packed closely together. It is hard to see the nucleus of the Milky Way because it is hidden by the gas and dust of the disc. It is almost certain that Sagittarius A* is a supermassive black hole at the centre of the nucleus.

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