Voyager 1 mit der Geschwindigkeit, mit der sie sich im Jahr bis 2026-10-25 nach außen bewegte (JPL Horizons). Fahrt: ohne Pause, ohne je nachzutanken.
Fakten
Kepler-47 d und Kepler-47 c haben eine Gleichgewichtstemperatur zwischen −50 und +50 °C.
Wie er entdeckt wurde
Erster Planet, entdeckt 2012 durch Transit (NASA Exoplanet Archive).
Seine Planeten
Kepler-47 d — 7 times Earth's width, Neptune-sized; its year lasts 190 days; about 41 °C, between freezing and boiling; found in 2019 by transit.
Kepler-47 c — 4.7 times Earth's width, Neptune-sized; its year lasts 300 days; about −5 °C, below freezing; found in 2012 by transit.
Kepler-47 b — 3.1 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 49 days; about 220 °C, hotter than boiling water; found in 2012 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.