Hubble observations reveal a giant, turbulent planet-forming disk that may reshape theories of how planetary systems develop.

When two black holes collide, it’s one of the most violent events in the universe, releasing energy that dwarfs anything […] ...

For more than a century, astronomers have watched in astonishment as the Andromeda galaxy ignored the grand flow of cosmic expansion and hurtled straight toward the Milky Way. While almost every other ...