Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

Researchers have found a candidate for the hypothetical Planet Nine, which could be an undiscovered giant planet way out in ...

Caroline Delbert is a writer, avid reader, and contributing editor at Pop Mech. She's also an enthusiast of just about ...

Astronomers may have found a candidate for Planet Nine. This planet is beyond Neptune. The finding could be the first ...

There have been questions about a mysterious ninth planet in our solar system for nearly a decade. Pluto was unseated as ...

The ongoing search for an additional planet at the solar system's edge has identified a new candidate, potentially ...

A Falcon 9 rocket launched SpaceX 's Starlink 6-75 mission Thursday night (May 1) from Cape Canaveral Space Force Station ...

Observations of exoplanets typically provide astronomers little more than an orbit, a mass and a radius. If the radius and ...

Catch some morning meteors, see the Moon reach First Quarter, and watch Mars visit the Beehive in the sky this week.

A Soviet-era spacecraft meant to land on Venus in the 1970s is expected to soon plunge uncontrolled back to Earth.