For decades, science fiction treated alien planets like Earth with a different paint job. This video shows how real exoplanet ...

This video is about the interesting and often-misunderstood story of the asteroids, and how they lost their planet-hood status; more recently than you may think!

Add Yahoo as a preferred source to see more of our stories on Google. Astronomers do not have a photo of Kepler-22b, but they used the so-called 'transit method' to detect it from 640 light-years away ...

Scientists have confirmed the existence of an exoplanet orbiting Barnard's star, the closest single star to the sun. Scientists say they've finally found a world orbiting Barnard's star, the closest ...

Beyond our solar system, countless alien worlds of lava, ice, water and noxious gas swirl through the cosmos. Here are some of the strangest exoplanets that scientists have discovered so far. When you ...

Planets are usually defined by the star they orbit. Take away the star, and a planet becomes almost impossible to find. This is because almost every method astronomers use to detect planets depends on ...

Forbes contributors publish independent expert analyses and insights. Leslie Katz covers the intersection of culture, science and tech. A yellowish-orange glow bathes Phainoterra, a planet of dramatic ...