An exoplanet or extrasolar planet is a planet outside the Solar System. An exoplanet (extrasolar planet) is a planet outside the Solar System. An exoplanet (extrasolar planet) is a planet located outside the Solar System. Within , there are 97 exoplanets listed as confirmed by the NASA Exoplanet Archive. It is the farthest potentially habitable exoplanet discovered, at approximately from Earth. HAT-P-9 b is the first transiting exoplanet confirmed in Auriga, orbiting the star HAT-P-9. In 2007, a new, potentially habitable exoplanet, Gliese 581c, was found, orbiting Gliese 581. The radius of a potentially habitable exoplanet would range between 0.5 and 2.5 Earth radii. Indi Ab is the closest Jovian exoplanet. The true color of the exoplanet HD 189733b determined by astronomers is azure blue. The Transiting Exoplanet Survey Satellite launched in April 2018. Possibilities for planetary, astrophysical and exoplanet science along the way are also being investigated. Eclipses were detected using data obtained with the Transiting Exoplanet Survey Satellite (TESS). Today, transit photometry is the leading form of exoplanet discovery. Observations of exoplanet atmospheres are of two types.