GJ 3090 b orbits its star backward, study reports

A 2026 study in Astronomy & Astrophysics finds the exoplanet's orbit is misaligned about 136 degrees from its host star's rotation.

Luisa Marconi

Senior Space Correspondent

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Exoplanet orbits star in reverse direction AI illustrationhow this picture was made

Exoplanet GJ 3090 b orbits its host star in a retrograde direction, circling opposite to the star's rotation with an orbital misalignment of approximately 136 degrees, a study in the journal Astronomy & Astrophysics reports.^[2] NASA's TESS space telescope first detected the planet by scanning the sky for transits, the periodic dips in brightness that mark a planet passing in front of its star.^[1]

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NASA's TESS space telescope first detected exoplanet GJ 3090 b by scanning the sky for transits, periodic brightness variations caused by a planet passing in front of its star. · Phys.org
A study published in the journal Astronomy & Astrophysics in 2026 reports that exoplanet GJ 3090 b orbits its host star in a retrograde direction, opposite to the star's rotation, with an orbital misalignment of approximately 136 degrees. · Phys.org
The James Webb Space Telescope confirmed nine new brown dwarfs in the star-forming region IC 348, which is located approximately 1,000 light-years away in the Perseus constellation. · Space Daily

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