GJ 436 - System
Simulates GJ 436 b, an eccentric hot Neptune trailing a huge comet-like helium and hydrogen tail. The oval orbit has persisted despite strong tides. The tail extends millions of kilometers behind the planet.
Exoplanets
Hall of Fame
Landmark exoplanet systems: the first confirmed planets, the discoveries that opened each detection method, and the architectures that changed the field. Pulsar planets, 51 Pegasi, transiting hot Jupiters, imaged giants, circumbinary worlds, and compact chains such as TRAPPIST-1. These systems also remain in their planet-count lists.
GJ 486 - System
Simulates GJ 486 b, a hot rocky planet around a nearby red dwarf. JWST watches its dayside glow to see whether any atmosphere survives. Emission spectra test whether any air remains at all.
GJ 504 - System
Simulates GJ 504 b, a cold giant planet imaged far from a Sun-like star. It is pinkish in infrared and one of the least massive planets seen directly.
GJ 876 - System
Simulates GJ 876, the first planet found around a red dwarf. Its giants are locked in a Laplace resonance, so their orbits keep a repeating gravitational rhythm.
GJ 9827 - System
Simulates GJ 9827, three planets straddling the radius valley. Neighbors on either side of the rocky-to-gaseous divide orbit the same star. The three planets were found by K2 photometry.
HAT-P-11 - System
Simulates HAT-P-11 b, an eccentric warm Neptune with water vapor in its atmosphere. It is one of the smallest planets with a measured transmission spectrum.
HAT-P-2 - System
Simulates HAT-P-2 b, a massive eccentric hot Jupiter. Eight Jupiter masses on a stretched orbit make the insolation swing sharply each perihelion. The planet is about eight times Jupiter's mass.
HAT-P-7 - System
Simulates HAT-P-7 b, whose phase curve Kepler measured early on. This hot Jupiter is misaligned, and reflected light shifts as it orbits. The planet's orbit is retrograde relative to the star.
HD 10180 - System
Simulates HD 10180, one of the richest radial-velocity systems. At least six planets, mostly packed inside Earth's orbit, orbit this quiet Sun-like star.
HD 106906 - System
Simulates HD 106906 b, a giant planet imaged at hundreds of AU. It orbits far above a debris disk, a clue to scattering or a stellar flyby. The planet's separation is hundreds of astronomical units.
HD 110067 - System
Simulates HD 110067, six sub-Neptunes in a resonant chain about 105 light-years away. Their periods follow a neat near-integer pattern around a bright K dwarf.
HD 149026 - System
Simulates HD 149026 b, a hot Saturn with an enormous heavy core. It is smaller than Jupiter despite its mass, implying a huge load of rock and ice. The core may hold most of the planet's mass.
HD 17156 - System
Simulates HD 17156 b, an early discovery of an eccentric transiting giant. It spends most of its year far out, then dives in for a brief, hot transit.
HD 189733 - System
Simulates HD 189733 b, the first exoplanet to have a weather map. This deep-blue hot Jupiter has a measured day-night contrast and ferocious winds. Sodium, water, and high-speed winds have been measured.
HD 20782 - System
Simulates HD 20782 b, a giant whose eccentricity is about 0.95 — among the most elongated planetary orbits known. It nearly skims the star, then retreats.
HD 209458 - System
Simulates HD 209458 b, nicknamed Osiris. It was the first transiting exoplanet and the first whose atmosphere was measured, including escaping hydrogen.
HD 219134 - System
Simulates HD 219134, one of the nearest multi-planet systems. This K dwarf, 21 light-years away, has transiting super-Earths plus outer giants. At 21 light-years, several of its planets transit.
HD 3167 - System
Simulates HD 3167, a multi-planet system with perpendicular orbits. The inner transiting world is tipped about 90 degrees from the outer planets. A polar inner orbit is rare among compact multiplanet systems.