TOI-178 - System
Simulates TOI-178, six planets in a Laplace-like resonant chain. Five outer worlds keep a repeating period pattern while differing wildly in density. The inner planet sits just outside the resonant chain.
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.
TOI-2109 - System
Simulates TOI-2109 b, one of the shortest-period giant planets known. An orbit of about 16 hours makes it an ultra-hot Jupiter near tidal breakup. The dayside is hot enough to vaporize most metals.
TOI-270 - System
Simulates TOI-270, a nearby benchmark of one super-Earth and two sub-Neptunes. The trio is a clean target for comparing rocky and gaseous atmospheres.
TOI-561 - System
Simulates TOI-561, an ancient thick-disk star about 10 billion years old. Its ultra-short-period rocky planet formed when the Milky Way was young. The inner planet's year lasts only about 10.5 hours.
TOI-700 - System
Simulates TOI-700, TESS's first Earth-sized habitable-zone planet. TOI-700 d orbits a quiet nearby red dwarf together with three inner worlds. TOI-700 e is a second world in the habitable zone.
TOI-849 - System
Simulates TOI-849 b, a dense Neptune sitting in the hot-Neptune desert. It may be the exposed core of a giant planet that lost its envelope. A year on this world lasts only about 19 hours.
TRAPPIST-1 - System
Simulates TRAPPIST-1, seven Earth-sized worlds in a resonant chain around an ultracool dwarf. Several orbit in the habitable zone, closer in than Mercury.
TYC 8998-760-1 - System
Simulates TYC 8998-760-1, a young star with two giant planets imaged on wide orbits. It is one of the few multi-planet systems seen directly. Both planets are still glowing from their formation heat.
Teegarden's Star - System
Simulates Teegarden's Star, a nearby ultracool dwarf with two Earth-mass planets in the habitable zone, among the closest potentially temperate worlds.
TrES-2 - System
Simulates TrES-2 b, the darkest known exoplanet. It reflects less than one percent of incoming light, darker than coal, despite being a hot Jupiter. Kepler later refined that coal-dark albedo.
V1298 Tau - System
Simulates V1298 Tau, a 20-million-year-old star with four transiting planets. They are still contracting and look far puffier than mature planets. The star is a young K dwarf in Taurus.
WASP-103 - System
Simulates WASP-103 b, the first planet whose tidal bulge was measured. CHEOPS detected the deformation as this hot Jupiter is stretched by its star. The planet is one of the closest, hottest Jupiters known.
WASP-107 - System
Simulates WASP-107 b, a super-puff Neptune with a helium tail. It is almost Jupiter-sized but only about 30 Earth masses, and its atmosphere is leaking.
WASP-12 - System
Simulates WASP-12 b, an inflated hot Jupiter so close that tides stretch it. Its orbit is decaying, and the planet may be spiraling into the star. Its year lasts a little more than one day.
WASP-121 - System
Simulates WASP-121 b, an ultra-hot Jupiter with a stratosphere. Metals and water are seen escaping from the dayside of this tidally locked world. One orbit takes only about 30 hours.
WASP-17 - System
Simulates WASP-17 b, the first planet found on a retrograde orbit. This bloated hot Jupiter circles opposite its star's spin and is larger than Jupiter.
WASP-18 - System
Simulates WASP-18 b, a massive hot Jupiter ten times Jupiter's mass. It is a key target for measuring whether tides are pulling it into the star. It is one of the most massive hot Jupiters known.
WASP-19 - System
Simulates WASP-19 b, an ultra-short-period hot Jupiter on a decaying orbit. A year lasts about 19 hours, and tides are dragging the planet inward. The period is only about 0.79 days and still shrinking.