The rocky bodies, which look like asteroids but act like comets, could comprise up to 60% of near-Earth objects.

Comets are icy bodies that formed alongside the planets in the early Solar System before being flung into its distant outer ...

NEOWISE, NASA’s retired infrared telescope, has tracked numerous near-Earth objects and discovered a rare comet since 2013.

NASA's Wide-field Infrared Survey Explorer (WISE) spacecraft launched to Earth orbit in 2009 and was placed in hibernation in ...

Water. All life on Earth requires it in some way or another, and it's hard to miss that roughly 70% of our planet's surface ...

This image, taken by ESA’s Rosetta navigation camera, was taken from a about 53 miles from the center of Comet 67P/Churyumov-Gerasimenko on March 14, 2015. The image resolution is 24 feet per ...

Scientists have revived the theory that short-period comets could have played a crucial role in filling Earth's oceans with ...

Martin A. B. Cohen said he took this picture from Warsash beach, in Hampshire, at 19:30 BST on Saturday People from around the UK have been taking pictures of the "comet of the century", which was ...

A reanalysis of the data from the "rubber-ducky" comet 67P, collected nearly a decade ago, suggests comets may have deposited ...

The origin of Earth’s abundant liquid water is still debated. Research suggests some water came from volcanic vapor that ...

Researchers have found that the water on Comet 67P/Churyumov–Gerasimenko has a molecular signature similar to Earth's ocean ...