Mercury will be retrograde three times in 2026: Mercury retrograde in Pisces: February 25 at 10:48 pm PT/February 26 at 1:48 ...

A single discovery in the outer solar system forced astronomers to confront a problem they couldn’t ignore, ultimately ...

"I think every astronomer is going to find something of value here, as NASA's missions enable the world to answer fundamental questions about how the universe got its start, and how it changed to ...

The colliding objects are at least 37 miles across — at least four times larger than the object that collided with Earth 66 ...

Legend has it that somewhere beyond Neptune and Pluto, there is a ninth planet, with a mass that is five times greater than ...

In 2004, a bright point of light in the debris disk surrounding Fomalhaut was thought to be an exoplanet. But the spot ...