Ocean world
Videos
An ocean world, ocean planet, water world, or water planet is a type of planet or natural satellite that contains a substantial amount of water in the form of oceans, as part of its hydrosphere, eithe
Earth's surface is dominated by the ocean, which forms 71% of Earth's surface. Thus, Earth can be considered a water world, although not a fully oceanic world.
Diagram of the interior of Enceladus. Ice crust Global ocean Rocky core The southern polar region shows active jets.
A set of exoplanets of varying size containing water, compared with the Earth (artist concept; 17 August 2018)
Atacama Large Millimeter Array image of HL Tauri, a protoplanetary disk
Eris (dwarf planet)
Videos
Eris is the most massive and second-largest known dwarf planet in the Solar System. It is a trans-Neptunian object in the scattered disk and has a high-eccentricity orbit. Eris was discovered in Janua
Low-resolution image of Eris and Dysnomia as imaged by the James Webb Space Telescope's NIRCam on 23 August 2024.
Eris and its moon Dysnomia imaged by Hubble Space Telescope on August 30, 2006. Dysnomia's orbit around Eris labeled.
Illustration of the stellar occultation by Eris in November 2010. The resulting occultation chords project a circular silhouette for Eris, giving a spherical diameter of 2,326 km (1,445 mi)
Artist's conception of Eris and its dark moon Dysnomia