Facts about Messier 110
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Messier 110's elliptical shape shows evidence of tidal disruption from its gravitational interaction with the much larger Andromeda Galaxy over billions of years.
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Messier 110's stellar population is dominated by old, red stars with an average age exceeding 10 billion years, indicating formation during the early universe.
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The galaxy's outer regions contain a faint extended stellar halo extending roughly 150,000 light-years from its center, revealing a complex formation history through tidal interactions with Andromeda.
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Several dwarf satellite galaxies orbit Messier 110, including the ultrafaint dwarf galaxy M110-DF1, which was identified through deep imaging surveys.
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X-ray observations reveal that Messier 110 lacks a supermassive black hole at its center, distinguishing it from most large galaxies in the universe.
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Messier 110 contains a dense nuclear star cluster at its center, indicating past mergers that funneled material toward its core.
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Discovered by Charles Messier in 1781, this elliptical galaxy orbits Andromeda at a distance of roughly 420,000 light-years from the Milky Way.
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Approximately 1 billion stars comprise Messier 110, making it the second-largest galaxy in the Local Group after Andromeda.