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

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

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

The popular whodunit series "Poker Face" starring Natasha Lyonne returning for its second season and Steven Soderbergh's ...

Yes, give us human beings credit. In our relatively brief history, it’s no small thing to have come up with two different ways of thoroughly devastating ...

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

Using two infrared space telescopes and a 23-year gap, scientists may have spotted a mysterious, slow-moving object beyond ...

The presence of another planet in the solar system could explain the odd movements of some of the bodies in the Kuiper Belt.

If the object really is Planet Nine, it would be larger than Neptune and exist 700 times further from the sun than Earth.

Astronomers have detected a promising sign of a ninth planet lurking at the the farthest reaches of the Solar System.