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New Rocky Super-Earth Discovered 18 Light-Years Away

11/15/2025

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Summary

Story summary

Astronomers identify a new super-Earth named GJ 251 c about 18 light-years from Earth.
The planet is rocky and nearly four times Earth's mass.
The discovery is detailed in The Astronomical Journal after more than 20 years of observations with Habitable-Zone Planet Finder and NEID.
Next-generation telescopes, such as the Thirty Meter Telescope, could image GJ 251 c.

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Story summary

Astronomers identify a new super-Earth named GJ 251 c about 18 light-years from Earth.
The planet is rocky and nearly four times Earth's mass.
The discovery is detailed in The Astronomical Journal after more than 20 years of observations with Habitable-Zone Planet Finder and NEID.
Next-generation telescopes, such as the Thirty Meter Telescope, could image GJ 251 c.