We Finally Found The Galaxies That Collided With The Milky Way

About 4.5 billion years from now, the Milky Way will collide with the Andromeda galaxy. This epic collision will lead to the formation of a new elliptical galaxy often nicknamed Milkomeda or Milkdromeda. But this won't be the first collision of our galaxy. Our galaxy is a monster that has crossed paths with and destroyed several galaxies in the past. But how do we know that it had a violent history? Where are those galaxies that once crossed paths with our galaxy? And most importantly, how did those collisions affect the evolution and the shape of the Milky Way?

The ninth episode of the Sunday Discoveries Series is about the research on Milky Way's past collisions with other galaxies. Astronomers have made two major discoveries related to the past collisions of the Milky Way. All the references can be found below:

All episodes of the series: https://bit.ly/369kG4p
Basics of Astrophysics series: https://bit.ly/3xII54M

REFERENCES:
Pontus Research Paper: https://bit.ly/3Nf2nM1
Gaia-Sausage Paper: https://go.nature.com/3lSmDXo
Milky Way-Andromeda collision: https://go.nasa.gov/3Q1ASr5
Arp Catalog: https://bit.ly/3z2eNm0

Written and Created by: Rishabh Nakra
Narrated by: Jeffrey Smith

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Galaxy Andromeda Milky Way Space