Answer to Question #179856 in Astronomy | Astrophysics for peter

Question

does milky way galaxy have any intergalactic star ?

Answer 1

It does. The intergalactic stars are stars that experience the gravitation force not only from the host galaxy, but also from the nearest galaxy since the galaxies are located relatively close. Milky Way has satellite galaxy Large Magellanic Cloud. It is believed that star HE 0437-5439 was originally born in LMC but then was "thrown away" by the energy released when its companion was attracted by the black hole in LMC. This star is at the edge of Milky Way and is moving extremely fast toward our galaxy's center.

Also, our galaxy is moving toward Andromeda galaxy, and they will merge in future. Even now there some stars that are intergalactic for Milky Way and Andromeda. As of 2015, approximately 675 stars have been discovered at the edge of the Milky Way, moving towards the Andromeda Galaxy.