What is the expected long-term fate for the Milky Way and Andromeda galaxies due to their current movement?

Answer

Merging to form a single, larger elliptical galaxy

Over timescales spanning tens of billions of years, the mutual gravitational attraction is expected to cause the two main spiral galaxies to merge, eventually forming a single, larger elliptical galaxy.

What is the expected long-term fate for the Milky Way and Andromeda galaxies due to their current movement?
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