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 groundbreaking study led by astronomers from the Chalmers University of Technology has unveiled an extraordinary phenomenon in space: a red supergiant star named DFK 52 expelled a vast bubble of gas ...

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 ...