This artist's illustration shows the K2-18b exoplanet orbiting its host star. Currently, this is the only exoplanet on Super Earth that has water vapor in its atmosphere and can be at the right temperature to sustain life.
This is an illustration of the loss of an exomonal mass as it pulls around the gas giant orbiting it.
The illustration shows what the orbit of the exoplanet HR 51
At least two giant planets, at most 20 million years old, Star Beta Pikoris. A disk of dust and gas surrounding the star can be seen in the background.
This is an artist's interpretation of what a super-Earth GJ 357 might look like. It is located in the habitable zone of its star, which is 31 light-years from Earth.
Impressions of the artist from a planetary disk around PDS 70 c, exoplanets of a gas giant in a star system at 370 light years away.
This artist's illustration shows two exoplanets of giant gases orbiting the orbit of the young star PDS 70. These planets are still growing, collecting material from the surrounding disk. In the process, they have gravitationally carved a large gap in the disk.
This is an illustration of the artist of NGTS-4b, also known to astronomers as "Forbidden Planet. "It rolls around its star every 1.3 days and still maintains a gaseous atmosphere in the Neptune Desert where no planets the size of Neptune meet.
HD 21749c, the first Earth-sized planet to be discovered by TESS, and its brother, HD 21749b, a warm mini-Neptune.
Hot Saturn passes in front of its star- hosted in this illustration.
Artist concept for TESS against the background of stars and orbiting planets in the Milky Way, Credit: ESA, M. Kornmesser (ESO), Aaron E. Lepsch (ADNET Systems Inc.), Britt Griswold (Maslow Media Group) , NASA & University of Cornell Goddard Space Flight Center
This image shows the artist's impression of the surface of the star of Barnard b, a cold Super-Earth, discovered in the orbit of a Bernard star of 6 light-years.
This artist's illustration shows the newly discovered exoplanet K2-288Bb, at 226 light-years and a half the size of Neptune. It orbits the weaker member of a pair of cool M-type stars every 31.3 days.
This is the impression of the exoplanet artist HAT-P-11b. The planet has an expanded helium atmosphere that blows away from the star, an orange dwarf star smaller but more active than our sun.
An artist's illustration of what super-Earth may look like around the orange star HD 26965 (also known as 40 Eridani A). The recently discovered exoplanet is compared to the fictional planet Vulcan, because Star Trek creator Gene Rodenbury said the star is the perfect candidate to host Volcano, Mr. Spock's home world.
The TRAPPIST-1 Star, an ultra-cool dwarf, has seven Earth-sized planets orbiting it
for the first time, eight planets have been discovered orbiting another star, linking our solar system to the most famous planets around one star. The Kepler-90 system is in the constellation Draco, more than 2500 light-years from Earth.
The illustration of this artist shows the exoplanet Ross 128b, with the red star-host-dwarf in the background. The planet is only 11 light-years away from our solar system. It is the second closest temperate planet to be found after Proxima b.
WASP-121b, at 880 light-years, is considered to be a hot Jupiter-like planet. It has a larger mass and radius than Jupiter, which makes it "larger." If WASP-121b were closer to the host star, it would be torn apart by the star's gravity.
NASA's Kepler Space Telescope Team has identified another 219 planet candidates, 10 of which are near-Earth-sized and in 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 more massive and almost twice as hot as our sun. The hot star blows up its nearby planet KELT-9b with huge amounts of radiation, leading to a daily temperature of 7800 degrees Fahrenheit, hotter than most stars and only 2000 degrees cooler than the sun.
This artist concept shows OGLE-2016-BLG-1195Lb, a planet orbiting an incredibly faint star 13,000 light-years away. This is an "ice ball" planet with temperatures reaching minus-400 degrees Fahrenheit.
The LHS 1140b is located in the habitable liquid water area surrounding its hospitable star, a small, pale red star called LHS 1140. The planet weighs about 6.6 times the size of the Earth's mass and is shown passing in front of LHS 1140. The blue depicts the atmosphere that the planet may have preserved.
Conceptual image of the artist on the surface of the exoplanet TRAPPIST-1f. Of the seven exoplanets discovered around the orbit of the TRAPPIST-1 dwarf star, this is perhaps the most suitable for life. It is similar in size to Earth, slightly cooler than Earth's temperature, and is in the habitable zone of the star, which means that liquid water (and even oceans) can be on the surface. The proximity of the star gives the sky a touch of salmon, and the other planets are so close that they appear in the sky, much like our own moon.
The artist's concept of a binary system with three giant planets was discovered where one star hosts two planets and the other hosts the third. The system represents the least binary resolution in which both stars host planets that have ever been observed.
The impression of this artist shows the planet Proxima b in the orbit of the red dwarf star Proxima Centauri, the closest star to our solar system.
The impression of this artist shows a view of the surface of the planet Proxima b.
Since the new discovery of 104 exoplanets, astronomers have discovered four Earth-sized orbits orbiting a dwarf star. Two of them have the potential to sustain life. The ship depicted in this illustration is the NASA Kepler Space Telescope, which has helped to confirm the existence of thousands of exoplanets.
The impression of this artist shows a view of the three-star system HD 131399 from close to a giant planet orbiting the system. Located about 320 light-years from Earth, the planet is about 16 million years old, making it one of the youngest exoplanets to date.
An artistic impression of the planet Kepler-1647b, which is almost identical to Jupiter both in size and mass. The planet is expected to be approximately similar in appearance. But it's much warmer: Kepler-1647b is in the habitable zone.
HD-106906b is a gaseous planet 11 times more massive than Jupiter. The planet is thought to have formed at the center of its solar system before being sent to fly to the edges of the region from a violent gravity event.
Kepler-10b orbits more than 20 times closer to its star than Mercury to our own sun. Daytime temperatures exceed 1300 degrees Celsius (2500 degrees Fahrenheit), which is hotter than the lava flow on Earth.
This planet, similar to Jupiter in HD-188753, 149 light-years from Earth, has three suns. The main star is similar in mass to our own Sun. The system is compared to the home planet of Luke Skywalker Tatooine in Star Wars.
Kepler-421b is a Uranus-sized transit exoplanet for the longest known year, having traveled its star once every 704 days. The planet orbits an orange K-type star that is cooler and darker than our Sun and is located about 1000 light-years from Earth in the constellation Lyra.
Astronomers have discovered two planets less than three times larger than Earth orbiting solar stars in a crowded star cluster approximately 3,000 light-years away from Earth in the constellation Kignus .  Strange and Wonderful Planets Beyond Our Solar System
This conception of the artist shows a hypothetical planet with two moons orbiting in the habitable zone of a red dwarf star. Most of the sun's closest star neighbors are red dwarfs.
Kepler-186f was the first validated Earth-sized planet to orbit a distant star in the habitable zone. This zone is at a distance from a star where liquid water can float on the surface of the planet.
Kepler-69c is a large-sized planet on Earth similar to Venus. The planet is located in the habitable zone of a star like our sun, approximately 2,700 light-years from Earth in the constellation Tsignus.
The Kepler-444 system was formed at the Milky Way only 2 billion years ago. The tightly packed system is home to five planets that vary in size, the smallest being comparable to the size of Mercury and the largest to Venus, orbiting their Sun in less than 10 days.
This depiction of the artistic concept compares Earth, on the left, with Kepler-452b, which is about 60% larger. Both planets orbit around a G2 star with roughly the same temperature; however, the star hosted by Kepler-452b is 6 billion years old – 1.5 billion years older than our sun.