Exoplanets

Some exoplanets seem to have walked directly out of the best science fiction movies. We’ve discovered single exoplanets orbiting two stars and as many as seven exoplanets orbiting a single star. We’ve probed the planet-forming disks that spawn these alien worlds, and we’re even starting to map the weather weather on these distant planets.

Here Sky & Telescope offers the latest exoplanet news, from super-Earths to hot Jupiters. We’ll continue monitoring results from the Kepler mission, the Hubble Space Telescope, and more to come as astronomers come up with new and creative methods for studying these alien worlds. The hunt for Earth 2.0 is on as we attempt to answer the age-old question: “are we alone?”

Fomalhaut b

Name the Exoworlds

Here's your chance to name an exoplanet, in a process recognized and officiated by the International Astronomical Union. Register your astronomy club or organization by June 1st!

This artist's conception shows the inner four planets of the Gliese 581 system and their host star, a red dwarf star only 20 light years away from Earth. The large planet in the foreground is the newly discovered GJ 581g, which has a 37-day orbit right in the middle of the star's habitable zone and is only three to four times the mass of Earth, with a diameter 1.2 to 1.4 times that of Earth.
Lynette Cook

Do Atmospheres Spin Worlds to Habitability?

The best place to look for nearby Earth-size planets are around the smallest, coolest stars. New research shows that any exoplanets tightly circling their stars might have a better chance of being habitable than previously thought.