Nearly 4.5 million years ago, two enormous, blazing stars swung close to the solar system. They did not touch the sun, but they came close enough to leave a permanent mark on the thin mist of gas that ...

A new discovery about what happens when a supernova – an exploding star – and a black hole collide could change the way scientists understand the lives and deaths of stars. The finding was the first ...

Massive stars have a layered structure, similar to an onion. The outermost layers predominantly comprise the lightest elements; as the layers move inward, the elements become heavier and heavier until ...