A new method could improve cosmology research by analyzing supernovae together with the galaxies that host them.

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 ...

If you know a little bit about stars, you've probably heard that the most massive ones end their lives by exploding: they go supernova. The end product of those events is an extremely dense object, ...