À propos 1,420 années-lumière. Pour la traverser :
Lumière1,420 ans
Vitesse de Voyager 125.2 millions d’années
Roule à 100 km/h15.3 milliards d'années
Voyager 1 à la vitesse à laquelle elle s'est éloignée au cours de l'année jusqu'à 2026-10-25 (JPL Horizons). En voiture : sans arrêt, sans jamais refaire le plein.
Méthode de découverte
Première planète découverte en 2014, par transit (NASA Exoplanet Archive).
Ses planètes
Kepler-304 e — 1.2 times Earth's width, about Earth-sized — probably rocky; its year lasts 36 hours; about 860 °C, hotter than boiling water; found in 2016 by transit.
Kepler-304 d — 2.8 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 10 days; about 340 °C, hotter than boiling water; found in 2014 by transit.
Kepler-304 b — 2.9 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 3 days; about 600 °C, hotter than boiling water; found in 2014 by transit.
Kepler-304 c — 2.2 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 5 days; about 470 °C, hotter than boiling water; found in 2014 by transit.
NASA Exoplanet Archive, Planetary Systems Composite Parameters (fetched 2026-11-02). Composite values: where a planet's size or mass was not measured, the archive estimates it from the other.
This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with NASA under the Exoplanet Exploration Program.