Nothing in our universe stands still: Earth orbits the sun, the sun circles the galaxy, and even galaxies are constantly on the move. So why is everything in space in motion? It all comes down to ...

In fact, “we have achieved colder places on Earth than anywhere in deep space,” according to Caram, “because deep space is always permeated with something called microwave background ...

Chandra spotted a 300,000-light-year jet from a distant quasar. But amid this breakthrough, the telescope now faces defunding ...