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sub-Neptune planet

Artist's depiction of a planet in retrograde motion. Credit - ESO/L. Calçada

Astronomers Find Sub-Neptune Orbiting Backward Around Red Dwarf

September 25, 2026 by Sophie Lin - Technology Editor

Astronomers have discovered GJ 3090 b, a small Neptune-sized exoplanet orbiting a cool red dwarf star in a completely retrograde path.

Categories Technology Tags Astronomy & Astrophysics, GJ 3090 b, M dwarf star, planet formation theory, retrograde exoplanet, sub-Neptune planet, University of Geneva Leave a comment

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