The search for planets orbiting other stars in our galaxy has revealed an extraordinary family of planets whose orbits are so carefully timed that they provide long-term stability for their planetary ...

A four-planet system observed several years ago by the Kepler spacecraft is actually a rarity: Its planets, all miniature Neptunes nestled close to the star, are orbiting in a unique resonance that ...

These animations show approximately 200,000 years of orbital evolution in the Kepler-223 planetary system. The planets' interactions with the disk of gas and dust in which they formed caused their ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. A super-Earth basks in the glow of its star in this artist's impression. Is the world habitable ...