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NGC 3379

M105 is one of a number of galaxies in the constellation of Leo, lying on an imaginary line between the stars Regulus and Denebola in the sky. As well as M105, this group of galaxies - known as the Leo I Group - also includes the spirals M95 and M96, and M105 is particularly closely associated with the elliptical galaxy NGC 3384.

M105 is also an elliptical galaxy, almost spherical in form, though within the outlines of its hazy sphere a faint dark ring of material can be seen surrounding the galaxy's core. That core is intensely active, and at least one supermassive black hole can be found there, though studies of the galaxy's behaviour imply that in fact a binary pair of black holes may lie at its heart. The galaxy lies some 38 million light years from the Milky Way.


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