Galaxies are one of the universeâs biggest observable systems. Big galaxies like our own Milky Way have all its stars move around supermassive black holes at their center, and are used to âeating upâ smaller galaxies in their path. But just as the bigger fish eats the smaller ones, we are at the mercy of the gigantic Andromeda Galaxy, which is on a course to merge with the Milky Way in around 4.5 billion years from now.
Binge-Eating Galaxy
Andromeda has a bigger and more complex stellar halo than our galaxy, and has cannibalized multiple galaxies in âbinge-eatingâ frenzies at least twice in the last 10 billion years. This monstrous neighbor will eventually swallow up our home galaxy too, and right now scientists are finding out how this will happen.
How can we see this?
Even though the Andromeda Galaxy is 2,537 million light years away from Earth, scientists can observe its phenomena by using five different telescopes. Researchers have also been able to recreate Andromedaâs history by analyzing Andromedaâs dense group of stars.
No need to panic
While the idea of seeing our galaxy absorbed by the Andromeda Galaxy seems terrifying enough, humanity will first have to deal with the Sun expanding and swallowing each planet in our Solar System at a time. So for the moment just sit back, and relax and enjoy the title things in life.
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