Dec. 21 not only marks the start of winter, but the peak of the last meteor shower of the year. If you’re eager to bundle up ...

Researchers have doubled the number of known dark comets, identifying two distinct types: larger ones in the outer solar ...

NASA scientists are grappling with puzzling celestial bodies that defy existing classifications. These objects, dubbed "dark ...

Astronomers posed over the past decade that dark comets, or objects that resemble asteroids but move like comets, may exist.