Caption An image of a dwarf elliptical galaxy satellite of the spiral galaxy NGC 7331, a galaxy similar to the Milky Way's companion, the great Andromeda galaxy M31. This image shows the same ...
NGC 7331 is similar in size, shape and mass to the Milky Way. It also has a comparable star formation rate, hosts a similar number of stars, has a central supermassive black hole and comparable ...
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