The quiet life of Messier 94

Most galaxies have bulges at their centers. Depending on their properties—specifically,

Stars within classical bulges move a bit randomly, resembling elliptical galaxies, and seem to be older than their galaxy,

Astronomers use a galaxy's stellar halo as a "fossil record" to study these bulges.

"Astronomers believe that when a galaxy merges with another galaxy, the merger will deposit material into the stellar halo of the galaxy it merged with,

The stellar halo extends far beyond what a galaxy appears to be at first glance,

The largest galaxy that crashed into M94 in the past was not massive at all.

Resolving stars is a pretty hard thing to do, but it is one of the best ways you can actually look at the halos

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