Dark comets are often small, just a few metres to a few hundred metres wide. This leaves less surface area for material to escape and form into the beautiful tails we see on typical comets.

NASA scientists are closely studying a new class of celestial objects known as "dark comets", the little-known celestial objects which have been challenging the human understanding of both comets ...

A widely held view is that these vital components were deposited on Earth by a long bombardment of icy comets. Comets are made of dust and ice. Astronomers have examined the water contained in ...

Jamie Carter is an award-winning reporter who covers the night sky. Astrophoto of periodic comet 12P/Pons-Brooks in the night sky. Green nucleus and tail of ion, dust ... [+] and vapor illuminated ...

People in the northern hemisphere will be able to see Saturn, Mercury, Neptune, Venus, Uranus, Jupiter and Mars during the planetary parade. The next full moon will happen on Feb. 12. Known as the ...