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Nineteen moons are large enough to be round, and two, Titan and Triton, have substantial atmospheres The number of moons discovered in each year until November 2019 Mercury , the smallest and innermost planet, has no moons, or at least none that can be detected to a diameter of 1.6 km (1.0 mi). [ 2 ]
[37] [2] These discoveries brought Saturn's total number of confirmed moons up to 145, making it the first planet known to have over 100 moons. [ 37 ] [ 38 ] [ 39 ] Yet another moon, S/2006 S 20 , was announced on 23 May 2023, bringing Saturn's total count moons to 146. [ 2 ]
Toggle Natural satellites of Saturn subsection. 5.1 Ring moonlets of Saturn. 5.2 Co-orbital moons of Saturn. 5.3 Inner large moons of Saturn. 5.4 Alkyonides group of ...
The outer Solar System with the giant planets, their satellites, trojan asteroids and some minor planets. Jupiter. Rings of Jupiter; Complete list of Jupiter's natural satellites. Galilean moons. Io; Europa; Ganymede; Callisto; Jupiter trojans; Jupiter-crossing minor planets; Saturn. Rings of Saturn; Complete list of Saturn's natural satellites ...
Saturn's rings require at least a 15-mm-diameter telescope [150] to resolve and thus were not known to exist until Christiaan Huygens saw them in 1655 and published his observations in 1659. Galileo, with his primitive telescope in 1610, [151] [152] incorrectly thought of Saturn's appearing not quite round as two moons on Saturn's sides.
Saturn XXXVII (unnamed moons of Saturn) S/2004 S 12 — — S/2004 S 13 — Hati: S/2004 S 14: Saturn XLIII Bergelmir: S/2004 S 15: Saturn XXXVIII i: 13 December 2004 p: 3 May 2005 Fenrir: S/2004 S 16 — Saturn XLI (unnamed moon of Saturn) S/2004 S 17 — — Bestla: S/2004 S 18: Saturn XXXIX i: 1 May 2005 p: 6 May 2005 Daphnis: S/2005 S 1 ...
Scientists previously thought Mimas was just a big chunk of ice before NASA’s Cassini mission studied Saturn and some of its 146 moons by orbiting the ringed planet between 2004 and 2017.
When satellites are first discovered, they are given provisional designations such as "S/2010 J 2" (the 2nd new satellite of Jupiter discovered in 2010) or "S/2003 S 1" (the 1st new satellite of Saturn discovered in 2003).