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An A-type star in Pegasus that in 2008 became the first multi-planet system to be directly imaged, with four confirmed giant planet companions revealed.
HR 8799 c is a gas giant exoplanet discovered orbiting the young A-type star HR 8799. It’s notable as one of the first planets directly imaged around another star and part of a multi-planet system. This planet, approximately twice the size of Jupiter, offers scientists a unique opportunity to study...
HR 8799 b is a young gas giant exoplanet discovered orbiting the star HR 8799, located approximately 129 light-years from Earth. Direct imaging by the Keck and Gemini telescopes in 2008 revealed its existence. This planet is notable for its youth and association with a multi-planet system around an...
HR 8799 d is a gas giant exoplanet located approximately 129 light-years from Earth. It’s notable as one of the first planets directly imaged around an A-type star and part of a multi-planet system discovered through direct imaging techniques. This planet orbits a young, Sun-like star and offers val...
A red dwarf ~15 light-years away in Aquarius, the first M-type star confirmed to host an exoplanet, with its giant planet GJ 876 b discovered in 1998.
Kepler-62 is a K-type star about 1,200 light-years away hosting five planets discovered by NASA's Kepler mission in 2013, including two super-Earths (62e and 62f) in the habitable zone.
A red dwarf ~20 light-years away in Libra that hosted some of the earliest claimed potentially habitable exoplanets, sparking major scientific debate over planet GJ 581 g.
Super-Earth in the Kepler-138 system confirmed in 2015, orbiting its M-dwarf host every ~13.8 days in near orbital resonance with the adjacent Mars-sized companion Kepler-138b.
47 Ursae Majoris is a Sun-like star about 46 light-years from Earth with multiple Jupiter-like exoplanets in nearly circular orbits, the first of which was discovered in 1996.
Outermost of the three originally confirmed Kepler-138 planets, a super-Earth orbiting its M-dwarf host every ~23.1 days, confirmed in 2015 alongside two inner companions.
Inner planet of Kepler-47, announced in 2012 as part of the first confirmed transiting circumbinary multi-planet system, completing an orbit around its binary host pair every ~49 days.
A hot Jupiter discovered in 1996 around Upsilon Andromedae, later recognized as part of the first confirmed multi-planet system around a sun-like star.
Mars-sized exoplanet in the Kepler-138 system confirmed in 2015, one of the smallest exoplanets with a directly measured mass, with a radius and mass closely matching those of Mars.
A Jupiter-mass hot Jupiter discovered in 1996 around the nearby star 55 Cancri, orbiting at just 0.11 AU with a period of about 14.7 days.
One of six tightly packed planets in the Kepler-11 system announced in 2011, representing one of the most compact and coplanar multi-planet systems discovered at that time.
Second of six confirmed planets in the compact Kepler-11 system, announced in 2011, with a low density suggesting a substantial volatile envelope surrounding a rocky core.
A circumbinary exoplanet discovered in 2019 using NASA's Kepler space telescope, notable for having the largest radius of the three known planets within this binary star system.
Third of six confirmed planets orbiting Kepler-11, part of the 2011 announcement that revealed how tightly packed planetary systems can be arranged within a single solar system.
Fourth of six confirmed planets in the Kepler-11 system, notable for its low bulk density and the system's collective role in advancing understanding of compact planetary architectures.
Announced in 1999 as part of the first confirmed multi-planet system around a main-sequence star, a giant planet orbiting Upsilon Andromedae every 241 days.
Fifth of six confirmed planets in the Kepler-11 system announced in 2011; together the six planets provided foundational constraints on planet formation and atmospheric escape models.
The outermost and largest of six confirmed planets in the Kepler-11 system announced in 2011, orbiting on a wider path than its five compact inner companions.
HD 10180 h is a Neptune-mass exoplanet orbiting HD 10180 about 127 light-years away, the outermost confirmed planet in a multi-planet system discovered in 2010 using the HARPS spectrograph.
