An expert shares how to view the great conjunction in the sky on December 21, and how the astrological event got dubbed the "Christmas Star."

An exoplanet 336 light years from Earth has a resemblance to the hypothetical "Planet Nine" of our own solar system, researchers say.

The tiny Stingray Nebula suddenly appeared in the 1980s. Now it's already begun fading, mere decades after it arrived. Here's why that's unusual.

Supernova research upends the origins of two of our planet's heavy elements and sheds light on a chemical reaction that "defines our existence."

The Blue Ring Nebula has stumped scientists for years. Now, they may have finally cracked the case: the weird gas blob appears to be from a stellar merger.

Researchers may have pinpointed a source of some fast radio bursts. They may come from neutron stars with extremely powerful magnetic fields called magnetars.

The vast majority of field massive stars are "runaways," or stars ejected from clusters, new research finds.

Research helps solve some of the mysteries about how stars come to be and to what extent molecular clouds in interstellar space play a role.

"Astronomers were making bets if such black holes existed or not, and people believed they could not exist, but we found it."

New research sheds light on how and when stars in our galaxy made carbon, "ending up within the raw material from which the sun and its planetary system..."