فوياجر 1 بالسرعة التي ابتعد بها خلال السنة حتى 2026-10-25 (JPL Horizons). القيادة: دون توقف، ودون التزود بالوقود أبدًا.
حقائق
تتراوح درجة حرارة التوازن لكبلر-47 d وكبلر-47 c بين −50 و+50 °س.
كيف اكتُشف
اكتُشف أول كوكب عام 2012 بطريقة العبور (أرشيف ناسا للكواكب الخارجية).
كواكبه
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.