The image of Comet Hale-Bopp blazing across the night sky of 1997 has delighted casual stargazers and astronomers alike. It was first spotted in July 1995 by Alan Hale and Thomas Bopp, who ...

The small photos of Comet Hyakutake and Comet Hale-Bopp in the initial color astrophoto montage do not do them justice. Here they have been reprocessed for a larger display. The photo of Comet ...

Whistling and moaning, a 50-mile-an-hour (80-kilometer-an-hour) wind whipped among the telescope domes atop Kitt Peak. Just a few feet below, turning gray in the dusk, slid a river of clouds that ...

In work to defend the planet against asteroids, a Hawaii-based researcher has used a Haleakala telescope to spot a comet, which was recently named after her.

A newly observed interstellar comet is the most pristine visitor from outer space ever seen in our Solar System, according to a pair of studies released Tuesday detailing its unique characteristics.