Celestial body Active
Miranda
Miranda is a major moon of Uranus, discovered by Gerard P. Kuiper in 1948 and closely observed by Voyager 2 in January 1986. The imagery revealed...
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Celestial body Active
Naiad
Naiad is a small inner moon of Neptune, discovered during the Voyager 2 flyby. It circles the planet in about seven hours and six minutes; NASA d...
Celestial body Active
Nereid
Nereid is an outer moon of Neptune, discovered by Gerard Kuiper in 1949 and notable for having one of the most eccentric satellite orbits known i...
Celestial body Active
Oberon
Oberon is a major moon of Uranus, described by NASA as the outermost of the five major moons. Its ancient, heavily cratered surface, approximate...
Celestial body Active
Pan
Pan is Saturn’s innermost known moon, located within the Encke Gap of the A ring. Its mean radius is 14.1 km, its orbital period is 13.8 hours, a...
Celestial body Active
Pandora
Pandora is a small moon of Saturn near the F ring. Cassini observations described by NASA show grooves, ridges, fine icy dust, and impact craters...
Cosmic structure Active
Pequeña Nube de Magallanes
Pequeña Nube de Magallanes · Galaxy · 15000 años luz.
Celestial body Active
Phobos
Phobos is the larger, inner moon of Mars: an irregular, regolith-covered body dominated by Stickney crater, with an orbit that is slowly drawing...
Celestial body Active
Phoebe
Phoebe is a large outer moon of Saturn with an elliptical, highly inclined, retrograde orbit. Cassini-Huygens evidence characterizes it as a poss...
Celestial body Active
Prometheus
Prometheus is an irregular moon of Saturn in the vicinity of the narrow F ring. Its gravity disturbs inner ringlets, producing channels and filam...
Celestial body Active
Proteus
Proteus is a natural moon of Neptune with a slightly non-spherical, heavily cratered surface. Voyager 2 discovered it in 1982, and it orbits Nept...
Celestial body Active
Próxima Centauri
Proxima Centauri is the nearest star to the Sun: an active red dwarf in the Alpha Centauri system, with a planet that illustrates the uncertainti...
Celestial body Active
PSR J0030+0451
PSR J0030+0451 is a stellar remnant included in the CosmoInsider stellar archive.
Celestial body Active
Rhea
Rhea is Saturn’s second-largest moon after Titan. Its cited diameter is about 1,527–1,528 km; it is mostly water ice, rotates synchronously with...
Celestial body Active
Rigel
Rigel is Orion’s blue supergiant, whose brightness variations and atmosphere help astronomers investigate the evolution of massive stars.
Celestial body Active
Sirio A
Sirio A is a main-sequence or subgiant star included in the CosmoInsider stellar archive.
Celestial body Active
Sirio B
Sirio B is a stellar remnant included in the CosmoInsider stellar archive.
Celestial body Active
Tethys
Tethys is Saturn’s fifth-largest moon, a cold, airless and heavily impact-scarred body globally mapped with Cassini images.