When we look up to the sky in 4 billion years, this is what we will see!!!
Using images from NASA's Hubble Space Telescope scientists were able to calculate the movement of our neighbouring galaxy, Andromeda. Traveling at 250,000 mph, the giant spiral is on a collision course with our own galaxy in about 4 billion years from now.
The Sky today
Check out the website below to see more images and a video simulation of the collision...
https://svs.gsfc.nasa.gov/11011/
Credit: Science@NASA, Space Telescope Science Institute (STScI) and NASA's Goddard Space Flight Center
Galaxy illustrations courtesy of NASA, ESA, Z. Levay and R. van der Marel (STScI) T. Hallas, and A. Mellinger
Visualization courtesy of NASA, ESA, and F. Summers (STScI)
Simulation courtesy of NASA, ESA, G. Besla (Columbia University) and R. van der Marel (STScI)