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Regulus and the Dwarf Galaxy

Regulus and the Dwarf Galaxy

In northern hemisphere spring , bright star Regulus is easy to spot above the eastern horizon. The alpha star of the constellation Leo, Regulus is the spiky star centered in this telescopic field of view . A mere 79 light-years distant, Regulus is a hot, rapidly spinning star that is known to be part of a multiple star system. Not quite lost in the glare, the fuzzy patch just below Regulus is diffuse starlight from small galaxy Leo I. Leo I is a dwarf spheroidal galaxy , a member of the Local Group of galaxies dominated by our Milky Way Galaxy and the Andromeda Galaxy ( M31 ). About 800 thousand light-years away, Leo I is thought to be the most distant of the known small satellite galaxies orbiting the Milky Way. But dwarf galaxy Leo I has shown evidence of a supermassive black hole at its center, comparable in mass to the black hole at the center of the Milky Way.

Media Credits & Attribution

Image Credit & Copyright: Markus Horn