A strange star has revealed to astronomers a mysterious past — one that involves the merger of two ancient suns.

Anyone tempted to ascribe the nighttime sightings of aircraft to alien intelligence ought to be dissuaded by the vast scale ...

The Sun reaches its southernmost point, the Ursid meteor shower peaks, and the Christmas Tree Cluster glitters in the sky ...

Heat from tidal forces remelted the Moon’s crust, says new reesarch, which may explain why the Moon is older than some ...

Binary stars can’t survive long near the Milky Way’s supermassive black hole — but for the first time, astronomers have managed to spot one.

In this episode, Dave Eicher invites you to observe the nearly full Moon as it passes Mars on the evening of December 17.

Despite systemic barriers, Young persisted in the face of adversity. Her legacy continues today, but there is much work still ...

All but one of the Apollo program’s used lunar modules either crashed into the Moon’s surface or burned up in Earth’s ...