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JWST Sees a Unique Mini-Neptune — the First to Match Predictions

MAY 08, 2025

The sub-Neptune TOI-421b is made of much the same stuff as its star — matching predictions, but bucking the trend among other similarly sized planets.

The sub-Neptune TOI-421b is made of much the same stuff as its star — matching predictions, but bucking the trend among other similarly sized planets.

The post JWST Sees a Unique Mini-Neptune — the First to Match Predictions appeared first on Sky & Telescope .