(Phys.org)—Andromeda IV, discovered in 1972 by Canadian astronomer Sidney Van den Berghan, is believed to be an irregular satellite of our neighboring Andromeda galaxy, also known as Messier 31. Now, a new study conducted by an international team of scientists led by Igor Karachentsev of the Special Astrophysical Observatory in Nizhnij Arkhyz, Russia, tells a different story regarding Andromeda IV’s true nature
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Andromeda IV turns out to be a solitary gas-rich dwarf galaxy