In The Little Prince, the classic novella by Antoine de Saint-Exupéry, the titular prince lives on a house-sized asteroid so small that he can watch the sunset any time of day by moving his chair a ...

Scientists have discovered over 4,000 exoplanets outside of our Solar System, according to NASA’s Exoplanet Archive. Some of these planets orbit multiple stars at the same time. Certain planets are so ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. This article is more than 6 years old. Should the 'habitable ...

Artist's illustration of the super-Earth alien planet Kepler-69c. "Super-Earth" planets are giant-size versions of Earth, and some research has suggested that they're more likely to be habitable than ...

Rocky worlds larger than Earth are commonplace in the galaxy, and a few of them may even be habitable. Which poses an interesting question: How difficult would it be for aliens living on these ...

It started off as a joke. A bunch of terrestrial primates can make it into space, while a civilization of advanced aliens remains stuck on their world. But it turns out that the challenge of space ...

For life as we know it to arise on another planet, scientists think the alien world must have three key ingredients: organic molecules that can form complex structures, energy to jiggle those ...

For the first time in years, astronomers are seriously talking about adding a new member to the solar system’s planetary ...

It probably isn't a black hole, if it exists at all. But two physicists think we should check to see if it's a black hole anyway. When you purchase through links on our site, we may earn an affiliate ...

NASA reports more than 400 gas giants – large gas planets like Jupiter or Saturn – have been discovered outside of Earth's solar system. However, the possibility that a gas planet could exist in the ...

AB Aurigae b is a newly forming planet projected to be nine times the size of Jupiter. Images of the exoplanet were captured by the Hubble Space and Subaru telescopes. New research supports the "disk ...

Editor's Note: Learn more about the announcement of the first Earth-size alien planets found in our story here. For life as we know it to arise on another planet, scientists think the alien world must ...