In how many years will the Milky Way and Andromeda Galaxy likely merge?

Answer

4 to 5 billion years

The Milky Way and Andromeda are being pulled toward one another by their mutual gravitational force. Based on current astronomical models of their high-velocity approach, these two massive galaxies are expected to interact and merge into a single larger elliptical galaxy in approximately four to five billion years.

In how many years will the Milky Way and Andromeda Galaxy likely merge?
galaxyastronomystructureLocal Group