World type · Proposed
Hycean Planet
A proposed class of exoplanet — a hot world with a hydrogen-rich atmosphere over a planet-wide ocean. If they exist, hycean planets would offer a much wider habitable zone than rocky worlds and be easier to study, but the class is hypothetical and its habitability unconfirmed.
Highlights
- ›A proposed, unconfirmed class of potentially habitable ocean world
Worlds, layers & processes
Knowledge connections
- Associated withMini-Neptune
- Associated withHabitable zone
- Associated withOcean Worlds
- Associated withClouds & Hazes
Sources
The primary and reference sources this topic draws on.
- NASANational Aeronautics and Space Administration
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.