Vomit Comet “These measurements give us a look at how this enormous, icy world works,” said lead author Nathan Roth of American University and NASA Goddard Space Flight Center. “We’re seeing explosive ...

Astronomers estimate that an asteroid this large comes this close to Earth only about once every 7,500 years. It also appears ...

Astronomers have discovered a gigantic comet, possibly the largest ever, which is emitting jets of carbon monoxide from its interior.

The next big space threat isn't to Earth. It's to the Moon.