Voyager 1 at the speed it moved outward over the year to 2026-10-25 (JPL Horizons). Driving: nonstop, never refuelling.
Facts
KOI-351 h has an equilibrium temperature between −50 and +50 °C.
How it was found
First planet found in 2013, by transit (NASA Exoplanet Archive).
Its planets
KOI-351 h — 11 times Earth's width, a giant, Jupiter-sized or more; its year lasts 330 days; about 21 °C, between freezing and boiling; found in 2013 by transit.
KOI-351 f — 2.9 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 120 days; about 130 °C, hotter than boiling water; found in 2013 by transit.
KOI-351 c — 1.2 times Earth's width, about Earth-sized — probably rocky; its year lasts 9 days; about 710 °C, hotter than boiling water; found in 2013 by transit.
KOI-351 b — 1.3 times Earth's width, about Earth-sized — probably rocky; its year lasts 7 days; about 790 °C, hotter than boiling water; found in 2013 by transit.
KOI-351 g — 7.7 times Earth's width, Neptune-sized; its year lasts 210 days; about 69 °C, between freezing and boiling; found in 2013 by transit.
Kepler-90 i — 1.3 times Earth's width, about Earth-sized — probably rocky; its year lasts 14 days; about 440 °C, hotter than boiling water; found in 2017 by transit.
KOI-351 d — 2.9 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 60 days; about 250 °C, hotter than boiling water; found in 2013 by transit.
KOI-351 e — 2.7 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 92 days; about 180 °C, hotter than boiling water; found in 2013 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.