No one knows where the comet came from. It’s like glimpsing a rifle bullet for a thousandth of a second,” said David Jewitt, the University of California, Los Angeles astronomer in charge of Hubble’s ...

Earth could be due a few extraterrestrial visitors, claims one Harvard professor, who has been watching an unexplained object flying through the universe heading to our planet ...

This week, astronomers have documented the occurrence of an unprecedented stellar death unlike anything seen before.