Scientists have begun their study of the fourth planet from the TRAPPIST-1 star. Credit: NASA / ESA / CSA / STScI / Joseph ...

Other planets and moons would be hurled from their paths, triggering collisions and widespread chaos. Humanity would face consequences long before we could ever set foot on rocky Jupiter.

Gravity not only holds us firmly to the ground but also anchors oceans, keeps the atmosphere in place, and binds planets and ...

Earth gazed into the cosmos, wondering if she would ever get a new planetary neighbor. To her astonishment, one day... it happened. This video explores the breathtaking and chaotic consequences of a ...

The solar system lost its ninth planet back when Pluto was demoted to a dwarf planet, but research might indicate that there ...

Transmissions between Earth and our own spacecraft could tell us where to look for potential alien transmissions.

Mars is known for its barren desert landscape and dry climate. But two recent studies in the journals Nature and Science go ...

But it’s not just looks. Rocky composition, general size, orbital behaviors—a lot of those qualities can be the same on both ...

How many dwarf planets are there in our solar system? The recent discovery of 2017 OF201 makes the tally anywhere between five and 18, plus hundreds of potentially undiscovered ones, depending on ...

Using data from NASA’s retired InSight lander, two separate teams of researchers found evidence of a sluggish Martian mantle ...