Astronomers estimate that the Andromeda galaxy will collide with our own Milky Way galaxy 8 billion years from now.
But CNN reports they now believe that another collision will happen even sooner.
The Large Magellanic Cloud will catastrophically collide with the Milky Way in 2 billion years.
That's according to a study published this month in the Monthly Notices of the Royal Astronomical Society.
The astronomers believe the impact is long overdue, and has a chance of sending our solar system "hurtling through space."
Our galaxy is orbited by smaller satellite galaxies, the kind of dance that can go on undisturbed for billions of years.