Which large neighboring galaxy is known to exhibit a measurable blueshift toward the Milky Way due to gravitational attraction?

Answer

Andromeda Galaxy (M31)

The Andromeda Galaxy (M31) is the nearest large galactic neighbor that is heading toward the Milky Way, resulting in a measurable blueshift.

Which large neighboring galaxy is known to exhibit a measurable blueshift toward the Milky Way due to gravitational attraction?
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