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An exoplanet is a planet that exists outside our solar systems. There are likely trillions of such planets. The number of known exoplanets continues to increase thanks to improving satellite technology and continuing research. The research in exoplanets includes the search for habitable planets similar to Earth.

It Rains Liquid Iron on Exoplanet WASP-76b
It rains liquid iron on exoplanet WASP-76b. The discovery was made by astronomers using the ESO's Very Large Telescope. (March 12, 2020)

Exoplanet WASP-18b Has a Smothering Stratosphere Dominated by Carbon Monoxide
NASA says there are no signs of water on WASP-18b and the stratosphere is loaded with carbon monoxide. (December 4, 2017)

Exoplanet 55 Cancri e May Be a Lava World
The exoplanet 55 Cancri e may be a lava world. One half of the planet appears to be completely molten. (March 30, 2016)

Astronomers Discover Ancient Star With 5 Earth-Sized Planets
Astronomers have discovered an ancient star with five Earth-sized planets. (January 27, 2015)

NASA Launches Series of Exoplanet Tourism Posters
NASA has launched an Exoplanet Travel Series featuring posters of what space tourism to the planets might be like. (January 8, 2015)

Eight More Exoplanets Found in Goldilocks Zone
Astronomers have discovered eight more exoplanets in the Goldilocks zone of their stars. (January 7, 2015)

100 Million Planets in Milky Way May Support Complex Life Say Astronomers
Astronomers report in a new study that 100 million planets in the Milky Way may support complex life. (June 10, 2014)

Two Exoplanets Discovered Orbiting Star 13 Light-years From Earth
Two exoplanets have been discovered orbiting Kapteyn's Star, a very old star located 13 light-years from Earth. (June 4, 2014)

Astronomers Discover a Mega-Earth in the Constellation Draco
Astronomers have discovered a new type of planet, called a Mega-Earth. It is located 560 light-years away in the constellation Draco. (June 2, 2014)

Exoplanet GU Psc b Takes 80,000 Years to Orbit Its Star
Exoplanet GU Psc b takes 80,000 years to orbit its star. The gas giant is 155 light years from our solar system. (May 13, 2014)

Exoplanet Beta Pictoris b has 8 Hour Days
Astronomers have determined the exoplanet Beta Pictoris b has 8 hour days. This is the firs time the length of exoplanet day has been measured. (April 30, 2014)

NASA Confirms Discovery of First Earth-Sized Planet in Habitable Zone of its Star
NASA has confirmed the discovery of the first Earth-sized planet located in the habitable zone of its star. The planet is Kepler-186f. (April 17, 2014)

NASA's Sunflower-Shaped Starshade Could Help Astronomers Take Better Pictures of Exoplanets
NASA is working on a prototype spacecraft named Starshade that could take pictures of planets orbiting other stars. (March 29, 2014)

Earth-sized Exoplanet Reportedly Discovered Orbiting Red Dwarf in Habitable Zone
The first Earth-sized exoplanet has reportedly been discovered in a habitable zone around its parent star, a red dwarf. (March 22, 2014)

Astronomers Locate First Earth-Mass Planet That Transits Its Host Star
Astronomers have located the first Earth-mass planet that transits its host star. It orbits a star located about 200 light-years away. (January 7, 2014)

Hubble Spots Two Cloudy Exoplanets
Hubble has found that the atmospheres of two exoplanets - GJ 436b and GJ 1214b - may be blanketed with clouds. (January 1, 2014)

Free-Floating Planet Without a Star Found 80 Light-Years Away
Astronomers have located a free-floating planet with no star 80 light-years from Earth. The planet formed about 12 million years ago. (October 10, 2013)

Astronomers Say Planets Can Form Without Parent Stars
Astronomers say planets can form from tiny dark clouds called globulettes. These free-floating planets from without a parent star. (August 21, 2013)

MIT Researchers Discover Exoplanet That Orbits Its Star in Just 8.5 Hours
MIT researchers have discovered an exoplanet that orbits its star in just 8.5 hours. The exoplanet is 7000 light-years from Earth. (August 19, 2013)

Astonomers Image Magenta Planet GJ 504b
Astronomers have imaged GJ 504b, which glows a dark magenta. The astronomers used data from the Subaru Telescope in Hawaii. (August 12, 2013)

X-Ray Observations Used to Detect Exoplanet Passing in Front of its Parent Star
X-ray observations have been used to detect an exoplanet passing in front of its parent star for the first time. (July 29, 2013)

Astronomers Say Azure Blue Exoplanet HD 189733b is Not Like Earth
Astronomers say exoplanet HD 189733b is blue like Earth, but this is about all it has in common with Earth. (July 11, 2013)

First Transiting Planets in a Star Cluster Discovered
Two planets, Kepler-66b and Kepler-67b, found in star cluster NGC 6811 located 3,000 light-years from Earth (June 26, 2013)

Rogue Planet Found Named CFBDSIR2149
Astronomers using ESO's Very Large Telescope announced they have found a planetary-mass object 100 light-years away they believe is likely a free-floating planet, or rogue planet that is not tied to a star. (November 14, 2012)

Zombie Planet Fomalhaut b is Back From the Dead
Exoplanet Fomalhaut b may be close to returning to the list of known exoplanets. (October 31, 2012)