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Tentative Discovery of Exomoon Could Rewrite Astronomy Books

12/3/2025

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Summary

Story summary

Astronomers report a tentative discovery of exomoon HD 206893 B I orbiting a Jupiter-like exoplanet about 133 light-years away.
The exomoon was identified by high-precision astrometry measuring stellar distances.
The research team is led by Quentin Kral of the Paris Observatory and urges more data to confirm the finding.
If confirmed, the discovery would mark a major advance, since no exomoons are yet confirmed among more than 6,000 exoplanets.

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Story summary

Astronomers report a tentative discovery of exomoon HD 206893 B I orbiting a Jupiter-like exoplanet about 133 light-years away.
The exomoon was identified by high-precision astrometry measuring stellar distances.
The research team is led by Quentin Kral of the Paris Observatory and urges more data to confirm the finding.
If confirmed, the discovery would mark a major advance, since no exomoons are yet confirmed among more than 6,000 exoplanets.