Andromeda

It Turns Out, Andromeda is Younger Than Earth… Sort Of

It Turns Out, Andromeda is Younger Than Earth… Sort Of

Since ancient times, astronomers have looked up at the night sky and seen the Andromeda galaxy. As the closest galaxy to our own, scientists have been able to observe and scrutinize this giant spiral galaxy for millennia. By the 20th century, astronomers realized that Andromeda was the Milky Way’s sister galaxy and was moving towards us. In 4.5 billion years, it will even merge with our own to form a supergalaxy.

Is our Milky Way galaxy a zombie, already dead and we don’t know it?

Is our Milky Way galaxy a zombie, already dead and we don’t know it?

Like a zombie, the Milky Way galaxy may already be dead but it still keeps going. Our galactic neighbor Andromeda almost certainly expired a few billion years ago, but only recently started showing outward signs of its demise.