#78 The Andromeda Galaxy is a cosmic neighbour that’s going to collide with our Milky Way Galaxy. Should we panic?

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No need to panic. Yet! We’ll be fine for the next 4 or 5 billion years, but Andromeda is heading our way. The Andromeda Galaxy was the first object to be identified as being outside our own galaxy, and it introduced us to extragalactic astronomy. And that’s not all. It can teach us more about dark matter and it could be home to billions of planets.

It’s a very cool neighbour, but one day - it’s kinda going to move in!

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