NASA said, the human galaxy will collide with the nearest galaxy, Andromeda (M31), for about four billion years.
Andromeda Galaxy (M31)
Experts about the universe said, if a collision between the two galaxies mentioned above, everything could be turned upside down.
NASA's announcement said: "We are tracking the motion of the Andromeda galaxy and will take about four billion years before the collision between two galaxies occurs."
NASA added that, after a collision, it would take another two billion years for the two galaxies to "fully combine".
Andromeda galaxy is about 2 million light-years away from Earth. In the sky, M31 manifests as an object with apparent magnitude of 3.4.
Observations so far show that Andromeda has at least 10 satellite galaxies.
