Space
We know there are stars moving fast enough to escape the Milky Way, so the same is probably true of other galaxies. Now, simulations suggest there could be almost 4000 stars from the Andromeda galaxy in the Milky Way today
By Alex Wilkins
Andromeda is our nearest galactic neighbour
Robert Gendler/ESA
The Milky Way might contain thousands of stars that were expelled from Andromeda, our closest galactic neighbour – and may even have brought planets with them.
Some stars in the Milky Way are moving so fast that they can escape our galaxy’s gravitational pull, which raises the question of whether similarly speedy stars could exist in, and potentially leave, other galaxies as well.
Now, Lukas Gülzow at the Karlsruhe Institute of Technology in Germany and his colleagues have calculated that the Milky Way …
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