À propos 1,890 années-lumière. Pour la traverser :
Lumière1,890 ans
Vitesse de Voyager 133.5 millions d’années
Roule à 100 km/h20.4 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 2012, par transit (NASA Exoplanet Archive).
Ses planètes
Kepler-55 b — 2.4 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 28 days; about 130 °C, hotter than boiling water; found in 2012 by transit.
Kepler-55 e — 1.6 times Earth's width, about Earth-sized — probably rocky; its year lasts 5 days; about 460 °C, hotter than boiling water; found in 2014 by transit.
Kepler-55 d — 1.6 times Earth's width, about Earth-sized — probably rocky; its year lasts 2 days; about 660 °C, hotter than boiling water; found in 2014 by transit.
Kepler-55 c — 2.2 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 42 days; about 76 °C, between freezing and boiling; found in 2012 by transit.
Kepler-55 f — 1.6 times Earth's width, about Earth-sized — probably rocky; its year lasts 10 days; about 290 °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.