For astronomers studying dark matter, the Bullet Cluster is one of the greatest laboratories in the universe. Follow-up ...

A swarm of galaxies called the Bullet Cluster is the biggest, best natural laboratory for studying dark matter that ...

Einstein’s theory of special relativity tells us that for a moving object, time passes more slowly than for a stationary ...

It’s the most significant leap forward in the study of black holes in decades, and proved a theory conceived by one of ...

Isn't it amazing how black holes work? The other night, I was watching a documentary about the universe, and I was struck by ...