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Holmberg IX
Dwarf irregular galaxy in the constellation of Ursa Major From Wikipedia, the free encyclopedia
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Holmberg IX is a dwarf irregular galaxy and a satellite galaxy of M81, located in the constellation of Ursa Major. It is a Magellanic type galaxy, similar to the Small Magellanic Cloud, neighbour galaxy to the Milky Way Galaxy.[3] The galaxy is named after Erik Holmberg who first described it, though it was originally discovered by Sidney van den Bergh in 1959.[4][3] Based on the observed age distribution of stars it contains, 20% of its stellar mass formed within the last 200 Myr, making it the youngest nearby galaxy.[5] It is also home to one of two yellow supergiant eclipsing binary systems.[6][7]
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