Stellar Catalog | Discover the nearby universe

Exoplanets are planets that orbit stars outside our solar system. Since the first confirmed discovery in 1992, astronomers have identified almost 6,000 exoplanets, with many more awaiting confirmation.

These planets come in a wide variety of sizes and types, including gas giants larger than Jupiter, rocky planets similar to Earth, and even planets that float freely without orbiting any star, known as rogue planets. The Stellar Catalog currently includes about one-third of all known exoplanets, with a focus on objects orbiting nearby stars.

Orbital period

The orbital period of an exoplanet is the time it takes to complete one full orbit around its star, usually measured in days. Most of the exoplanets discovered so far have orbital periods of less than one year.
Orbital period

Distance from star

The distance between an exoplanet and its star is one of the most important factors in understanding the planet’s environment. It affects the planet’s temperature, the amount of radiation it receives, and whether it might be habitable. Astronomers often calculate this distance using the planet’s orbital period (how long it takes to complete one orbit) and the mass of the star. With these values, they can apply Kepler’s laws to estimate how far the planet is from its star.
Distance from star

Planet temperature

The temperature of a planet depends mostly on how much energy it receives from its star. This is influenced by the planet’s distance from the star, the star’s brightness, and the planet’s atmosphere, if it has one. A planet that orbits close to a hot star is usually much warmer than one farther away.
Planet temperature

Exoplanet mass

The mass of an exoplanet is one of the most important characteristics for understanding what kind of world it is — whether it’s small and rocky like Earth or large and gaseous like Jupiter. Mass provides key information about the planet’s composition, gravity, and formation history.
Exoplanet mass

StellarGuide: Exoplanets

Orbital period

Distance from star

Planet temperature

Exoplanet mass