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 1992, by pulsar timing (NASA Exoplanet Archive).
Its planets
PSR B1257+12 b — 0.3 times Earth's width (estimated from its mass, not measured), smaller than the Earth; its year lasts 25 days; found in 1994 by pulsar timing.
PSR B1257+12 c — 1.9 times Earth's width (estimated from its mass, not measured), a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 67 days; found in 1992 by pulsar timing.
PSR B1257+12 d — 1.8 times Earth's width (estimated from its mass, not measured), a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 98 days; found in 1992 by pulsar timing.
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.