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-454 c بين −50 و+50 °س.
كيف اكتُشف
اكتُشف أول كوكب عام 2015 بطريقتي السرعة الشعاعية والعبور (أرشيف ناسا للكواكب الخارجية).
كواكبه
Kepler-454 d — 13 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts about 11 Earth years; about −150 °C, below freezing; found in 2023 by radial velocity.
Kepler-454 b — 2.4 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 11 days; about 640 °C, hotter than boiling water; found in 2015 by transit.
Kepler-454 c — 13 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts 520 days; about −23 °C, below freezing; found in 2015 by radial velocity.
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.