MARK GARLICK / SCIENCE PHOTO LIBRARY MARK GARLICK / SCIENCE PHOTO LIBRARY
This illustration shows the centre of the Milky Way galaxy, located 26, 000 light years from the Solar System in the constellation Sagittarius. Photos of this region, in the infrared and the X-ray bands, reveal a supermassive black hole called Sagittarius A* (pronounced, A-star, centre) surrounded by a dusty disc. Also present are filamentary curtains of nebulosity, and a wealth of bright, high-mass stars. This image represents a region a few hundred light-years across.
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