A planet orbiting a star outside our solar system. Thousands have been found since the first confirmed discovery in 1992, primarily by NASA's Kepler and TESS missions. Exoplanets show a wide variety of sizes, compositions, and orbital configurations.
The region around a star where liquid water could exist on a planet's surface, often called the Goldilocks zone. It vari...
A technique for detecting exoplanets by measuring a star's dimming as a planet passes in front. The most successful dete...
A massive, luminous sphere of hot gas held together by gravity, generating energy through nuclear fusion. Stars range fr...
Dive deeper into exoplanet and related concepts on Cosmos Observatory.