Long-lost sibling of the Milky Way was eaten by Andromeda billions of years ago

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Scientists have discovered the remnants of a galaxy hiding in plain sight.

The galaxy, named M32p, was once the third largest in the group of galaxies nearest to our Milky Way — known as the Local Group. The Andromeda galaxy and M32p existed in harmony until around 2 billion years ago, but then something shifted. 

According to a new study published in the journal Nature Astronomy today, Andromeda actually devoured the smaller galaxy, and its remains can be see in the clouds, gas, and dust of the huge galaxy today.

Massive galaxies like Andromeda automatically attract other galaxies to it when they’re in close enough range due to its size and its gravitational pull. Because of that, it’s not unusual for a galaxy of that mass to effectively cannibalize other nearby galaxies nearby.  Read more…

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Thousands of previously unseen black holes lurk near the center of our galaxy

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The heart of the Milky Way is stacked with black holes. 

According to a new study published this week in the journal Nature, the center of our galaxy appears to play host to more than 10,000 relatively small black holes that we have gone undiscovered until now.

These black holes could help us explain the history of the Milky Way and understand other galaxies on a grand scale.

Some of these black holes — objects so dense that light can’t even escape them — interact with stars and the supermassive black hole called Sagittarius A* (pronounced “Sagittarius A-Star”) that functions as the core of the Milky Way.  Read more…

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