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 2025, by transit and radial velocity (NASA Exoplanet Archive).
Its planets
HD 224018 c — 2.4 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 37 days; about 370 °C, hotter than boiling water; found in 2025 by transit.
HD 224018 d — 2.4 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 140 days; about 140 °C, hotter than boiling water; found in 2025 by transit.
HD 224018 b — 0.9 times Earth's width, about Earth-sized — probably rocky; its year lasts 11 days; about 700 °C, hotter than boiling water; found in 2025 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.