The object, named NGC 6099 HLX-1, first appeared in 2009. Chandra caught the bright X-ray flash near the galaxy’s outskirts.

The universe is full of mysteries, but not all of them are pleasant. Delve into 20 disturbing and shocking facts about the ...

Most of the black holes we know of are in two categories. They are either supermassive, millions or billions of times the ...

NASA was a mere passenger. Musk has crowded low Earth orbit with satellites (nearly 8,000) that are becoming indispensable to ...