Voyager 1 at the speed it moved outward over the year to 2026-10-25 (JPL Horizons). Driving: nonstop, never refuelling.
How it was found
First planet found in 2010, by transit (NASA Exoplanet Archive).
Its planets
Kepler-11 b — 1.8 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 10 days; about 580 °C, hotter than boiling water; found in 2010 by transit.
Kepler-11 f — 2.5 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 47 days; about 240 °C, hotter than boiling water; found in 2010 by transit.
Kepler-11 c — 2.9 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 13 days; about 510 °C, hotter than boiling water; found in 2010 by transit.
Kepler-11 d — 3.1 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 23 days; about 380 °C, hotter than boiling water; found in 2010 by transit.
Kepler-11 e — 4.2 times Earth's width, Neptune-sized; its year lasts 32 days; about 310 °C, hotter than boiling water; found in 2010 by transit.
Kepler-11 g — 3.3 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 120 days; about 100 °C, hotter than boiling water; found in 2010 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.