At least two giant planets no more than 20 million years old orbit the Beta Pictoris star. In the background is a dust and gas disc that surrounds the star.
This is an artist's interpretation of what Super-Earth GJ 357d might look like. It is located in the habitable zone of its star, 31
Artistic representation of a planetary disk around PDS 70 c, a gas giant exoplanet in a star system 370 light-years away.
This artist's illustration shows two gas giant exoplanets orbiting the young star PDS 70. These planets are still growing by collecting material from a surrounding disk. They have gravitativ worked out a large gap in the disc.
This is an artistic representation of NGTS-4b, also known to astronomers as "The Forbidden Planet." "It whips its star every 1.3 days and still has a gaseous atmosphere in the Neptune Desert where no Neptune-sized planets are found.
An artistic representation of HD 21749c , the first planet-sized planet found by TESS, and its sibling HD 21749b, a warm mini-Neptune.
A "hot Saturn" passes in front of its host star in this illustration Astronomers studying stars used "starquakes" to characterize the star that provided important information about the planet.
Artist concept of TESS against the backdrop of stars and planets in Picture credits: ESA, M. Kornmesser (ESO), Aaron E. Lepsch (ADNET Systems Inc.) , Britt Griswold (Maslow Media Group), Goddard Space Flight Center of NASA and Cornell University
This image shows an artistic representation of the surface of Barnard's star b, a cold super-Earth that Barnard's orbit has discovered star 6 light-years away.
This artist's illustration shows the newly discovered exoplanet K2-288Bb, 226 light-years away and half the size of Neptune. He orbits the weaker member of a pair of cool M-Stars every 31.3 days.
This is an artistic illustration of the exoplanet HAT-P-11b. The planet has an extended helium atmosphere that is blown away from the star, an orange dwarf star that is smaller but more active than our sun.
An artistic depiction of what the super-earth is found around the orange star HD 26965 (also known as 40 Eridani A) might look like. The recently discovered exoplanet is compared to the fictional planet Vulcan because Star Trek creator Gene Roddenberry said the star was the ideal candidate for Vulcan, Mr. Spock's homeworld.
The TRAPPIST 1 star, an ultra-cool dwarf, has seven earth-sized planets orbiting it.
For the first time, eight planets have been found orbiting another star, binding with our solar system for the most prominent planets around a single star. The Kepler 90 system is located in the constellation Draco, more than 2,500 light-years from Earth.
The illustration by this artist shows the exoplanet Ross 128 b with its red dwarf star in the background. The planet is only 11 light-years away from our solar system. It is the second closest moderate planet to be discovered after Proxima b.
WASP-121b, 880 light-years away, is considered a hot Jupiter-like planet. It has a larger mass and a larger radius than Jupiter, which makes it "bloated". If WASP-121b were closer to its host star, it would be torn apart by the star's gravity.
NASA's Kepler Space Telescope Team has identified 219 other planetary candidates, 10 of which are near Earth and within the habitable zone of their stars.
Welcome to the KELT-9 system. The Host Star is a hot, fast-spinning Type A star that is about 2.5 times as massive and almost twice as hot as our Sun. The hot star radiates massively on its nearby planet KELT-9b, resulting in a daylight temperature of 7800 degrees Fahrenheit, hotter than most stars and only 2000 degrees cooler than the sun.
The concept of this artist shows OGLE-2016-BLG-1195Lb, a planet orbiting an incredibly faint star that is 13,000 light years away from us. It is an "ice-ball" planet with temperatures of minus 400 degrees Fahrenheit.
LHS 1140b is located in the habitable liquid water zone around its host star, a small, faint red star called LHS 1140. The planet weighs about 6.6 times the mass of Earth and Earth Demonstrating how to drive past LHS 1140. Shown in blue is the atmosphere that the planet may have preserved.
The concept image of an artist of the surface of the exoplanet TRAPPIST-1f. Of the seven exoplanets orbiting the ultra-cool dwarf star TRAPPIST-1, it is probably best suited for life. It is a similar size to Earth, a bit cooler than Earth's temperature, and is located in the star's habitable zone, which means that liquid water (and even oceans) could be on the surface. The proximity of the star gives the sky a salmon color, and the other planets are so close that they appear in the sky like our own moon.
Artistic conception of the binary system with three giant planets discovered, with one star hosting two planets and the other the third. The system represents the smallest separation bin number in which both stars host planets that have ever been observed.
The depiction of this artist shows the planet Proxima b orbiting the red dwarf star Proxima Centauri. the next star to our solar system.
This artist's depiction shows a view of the surface of the planet Proxima B.
An artist's depiction shows earth-sized images of exoplanets TRAPPIST -1b and 1c pass through their ultra-cool red dwarf star in a rare double-transit event, giving Hubble a glimpse of their atmosphere.
In a recent discovery of 104 exoplanets, astronomers found four Earth-like planets orbiting a dwarf star. Two of them have the potential to support life. The vehicle shown in this illustration is NASA's Kepler Space Telescope, which has confirmed the existence of thousands of exoplanets.
The depiction of this artist shows a view of the three-star system HD 131399 from the vicinity of the giant planet orbiting in the system. The planet is about 320 light-years from Earth and is about 16 million years old. This makes him one of the youngest exoplanets discovered so far.
An artistic impression of the planet Kepler-1647b, which is almost identical in size and mass to Jupiter. It is expected that the planet has a similar look. But it is much warmer: Kepler-1647b is located in the residential area.
HD-106906b is a gaseous planet eleven times more massive than Jupiter. It is believed that the planet formed in the middle of its solar system before it flew by a violent gravitational event to the edges of the region.
Kepler-10b orbits more than 20 times closer to its star than Mercury to our own Sun. Daytime temperatures exceed 1,300 degrees Celsius (2,500 degrees Fahrenheit), which is hotter than the lava flow on Earth.
This Jupiter-like planet in the HD 188753 system, 149 light-years from Earth, has three suns. The main star has a similar mass as our own sun. The system was compared to Luke Skywalker's home planet Tatooine in Star Wars.
Kepler-421b is a Uranus-sized exoplanet with the longest known year since it orbits a star every 704 days. The planet orbits an orange star of type K, which is cooler and darker than our sun and located in the constellation Lyra about 1,000 light-years from Earth.
Astronomers discovered two planets that are less than three times the size of the Earth, orbiting Sun-like stars in a crowded star cluster located about 3,000 light-years from Earth in the constellation Cygnus ,  Eerie and wonderful planets beyond our solar system
The conception of this artist shows a hypothetical planet with two moons orbiting in the habitable zone of a red dwarf star. The majority of the Sun's nearest stellar neighbors are red dwarfs.
Kepler-186f was the first validated Earth-sized planet orbiting a distant star in the habitable zone. This zone is located at some distance from a star, where liquid water could accumulate on the surface of the planet.
Kepler-69c is a super-sized planet similar to Venus. The planet is located in the habitable zone of a star like our Sun, about 2,700 light years from Earth in the constellation Cygnus.
The Kepler-444 system originated when the Milky Way was formed, only 2 billion years ago. The densely packed system houses five planets, the smallest being the size of Mercury and the largest the Venus, and orbiting the Sun in less than 10 days.
This artistic concept image compares the left Earth with Kepler-452b, which is about 60% larger. Both planets orbit a G2 type star at about the same temperature; However, the star with Kepler-452b is 6 billion years old – 1.5 billion years older than our Sun.