Anthe • [13] Tethys, Dione, Rhea and Iapetus (the "Sidera Lodoicea") were discovered between 1671 and 1684 by Giovanni Domenico Cassini. Enceladus (Saturn II) Enceladus is about 310 miles in diameter and has a range of surface features like craters and distinct terrains. Over 150 moonlets embedded in the rings have been detected by the disturbance they create in the surrounding ring material, though this is thought to be only a small sample of the total population of such objects. Haze-enshrouded Titan is Saturn’s largest moon and the solar system’s second-largest, and an all-around exceptional place. [9] In 2007, the discovery of 150 more moonlets revealed that they (with the exception of two that have been seen outside the Encke gap) are confined to three narrow bands in the A Ring between 126,750 and 132,000 km from Saturn's center. S/2003 J 4 • Fornjot • Wisdom, R. West, G. Neukum, T. Denk, R. Wagner, T. Roatsch, S. Kieffer, E. Turtle, A. McEwen, T. V. Johnson, J. Rathbun, J. Veverka, D. Wilson, J. Perry, J. Spitale, A. Brahic, J. The arrival of the Voyager spacecraft at Saturn in 1980–1981 resulted in the discovery of three additional moons – Atlas, Prometheus and Pandora, bringing the total to 17. Harpalyke • With a diameter of 697 miles, two-thirds of Dione’s mass is water ice and the remaining area is believed to be made up of silicate rock. [27] The precise size as well as albedo of the irregular moons are not known for sure because the moons are very small to be resolved by a telescope, although the latter is usually assumed to be quite low—around 6% (albedo of Phoebe) or less. 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Like Earth, Titan has wind, rain, and features like dunes, lakes, deltas, and rivers, as well as observable weather patterns. Titan, which is larger than the planet Mercury, orbits Saturn at a distance of 759,000 miles away. Carpo • [42], In 2006, four tiny moonlets were found in Cassini images of the A Ring. S/2004 S 30 • [41], Janus and Epimetheus are called co-orbital moons. [28][37] The moons are Ijiraq, Kiviuq, Paaliaq, Siarnaq, and Tarqeq,[37] along with two unnamed moons S/2004 S 29 and S/2004 S 31. "Saturn overtakes Jupiter as planet with most moons", "Solar System Exploration Planets Saturn: Moons: S/2009 S1", "The Giant Planet Satellite and Moon Page", "Titan: Facts About Saturn's Largest Moon", "Enceladus - Overview - Planets - NASA Solar System Exploration", "Help Name 20 Newly Discovered Moons of Saturn! [55], Trojan moons are a unique feature only known from the Saturnian system. Lainey worked on the study as a scientist at NASA's Jet Propulsion Laboratory. In 1990, Pan was discovered in archival Voyager images. That means, according to scientists, Titan could have the right conditions for life to develop. The surface is smoot… Planetary scientists now think Enceladus may possibly be hospitable to life. Der zweite Mechanismus ist das Bombardement durch Mikrometeoriten, die auf der Oberfläche des Mondes einschlagen und Staubteilchen freisetzen. Man vermutete, sie könnten durch Vulkane, Geysire oder andere Aktivitäten ausgestoßen werden. Die Abweichung von etwa 3 % ist auf die Gezeitenkräfte von Saturn zurückzuführen, was dem Mond die Form eines Ellipsoids verleiht. Naiad • Mundilfari • The innermost large moons of Saturn orbit within its tenuous E Ring, along with three smaller moons of the Alkyonides group. What you see in the photo are clouds in the atmosphere, silhouetted against that inner glow, according to NASA. S/2010 J 1 • Data collected during NASA's Cassini-Huygens mission to study Saturn and some of its moons has revealed that Titan's migration rate equals about 4 inches per year. S/2004 S 17 • Aber auch organische Materialien, die bereits durch eine spektroskopische Analyse einer Sternbedeckung nachgewiesen wurden, waren häufiger als erwartet. StarDate depends on the support of listeners and astronomy enthusiasts like you. Diese Fontänen speisen wahrscheinlich den E-Ring des Saturns. The moonlets were probably formed from the breakup of a larger satellite. Surtur • Triton, Vulkanische Aktivität in der Südpolarregion. [28] The irregulars generally have featureless visible and near infrared spectra dominated by water absorption bands. [21][22] Damit wurde die Schale höherer Dichte und geringerer Festigkeit entdeckt, die als ein Wasserozean mit einer Tiefe von 10 km unter 30 bis 40 km Eis interpretiert wird. Die Raumsonde Cassini untersuchte den Mond bei mehreren nahen Vorbeiflügen ab März 2005. Hippocamp • Es könnte sich in Kammern befinden, die möglicherweise nur einige Meter unter der Oberfläche liegen, und bräche dann ähnlich einem Geysir an die Oberfläche aus. Analyses performed by the VIMS spectrometer on board Cassini suggest that the 200 km diameter moon Phoebe may be of similar origin. Farbauti • Taygete • Auf seiner Oberfläche konnten verschiedene Terrains ausgemacht werden. The Saturn II was a series of American expendable launch vehicles, studied by North American Aviation under NASA contract in 1966, derived from the Saturn V rocket used for the Apollo lunar program. Metis • Es gibt Hypothesen, dass die ersten primitiven Lebensformen auf der Erde in der Nähe solcher heißen Hydrothermalquellen entstanden sind. That energy pushes the moon further away. Ananke • Desdemona • [16] When in the 20th century the names of Titans were exhausted, the moons were named after different characters of the Greco-Roman mythology or giants from other mythologies. Liste der Monde von Planeten und Zwergplaneten,, „Creative Commons Attribution/Share Alike“, Mosaik des Enceladus in Falschfarben aus Bildern der Raumsonde. Der Vorgang erinnert in seinen Effekten an die Plattentektonik der Erde oder an vergleichbare Aktivitäten auf dem Jupitermond Europa. Bestla • Scientists describe Enceladus' shape as scalene ellipsoid, orbiting 147886.344 miles from Saturn’s center and 111846.82 miles from its clouds. Named after the Alkyonides of Greek mythology, they are some of the smallest moons in the Saturn system. [43] Before this discovery only two larger moons had been known within gaps in the A Ring: Pan and Daphnis. Diese Theorie wurde durch die Vorbeiflüge von Cassini gestützt. [9] There, "jets" of material may be due to collisions, initiated by perturbations from the nearby small moon Prometheus, of these moonlets with the core of the F Ring. The rings of Saturn are made up of objects ranging in size from microscopic to moonlets hundreds of meters across, each in its own orbit around Saturn. [19] In addition, Epimetheus was confirmed as distinct from Janus. Saturn's moons and rings. NASA says the montage of images was created using data from Cassini's visual and infrared mapping spectrometer. Saturn is also being orbited by a man-made satellite, the space probe Cassini, which will remain in orbit around the planet until at least 2008. August 2015. Die Massenverteilung im Inneren des Mondes beeinflusst die Flugbahn der Sonde, was über die Dopplerverschiebung ihrer Funksignale vermessen werden kann. Pickering. Megaclite • [46], In April 2014, NASA scientists reported the possible consolidation of a new moon within the A Ring. Titan, at 5,149 km diameter, is the second largest moon in the Solar System … [33], The modern names for Saturnian moons were suggested by John Herschel in 1847. But scientists are less certain about when the planet's signature rings and many moons formed. Cassini took this final image of Saturn's rings on September 13, 2017 while the spacecraft was 684,000 miles (1.1 million kilometers) away from the planet. [27] Im Vorbeiflug gesammelte Daten aus den aus Enceladus entweichenden Gasen zeigen die Existenz von molekularem Wasserstoff sowie von komplexen organischen Molekülen an, was die These des Wasserozeans unter dem Eis und die Existenz hydrothermaler Quellen unterstützt. Himalia • Other comets and asteroids may have temporarily orbited Saturn at some point, but none are presently known to have. [21][25] These moons together with co-orbitals (see below) probably formed as a result of accretion of the friable ring material on preexisting denser cores. Pallene • Thrymr • Dazu wurden Vorbeiflüge von Cassini genutzt und ausgewertet. [26] (related image), Study of Saturn's moons has also been aided by advances in telescope instrumentation, primarily the introduction of digital charge-coupled devices which replaced photographic plates. Particularly notable among Saturn's moons are Titan, the second-largest moon in the Solar System (after Jupiter's Ganymede), with a nitrogen-rich Earth-like atmosphere and a landscape featuring dry river networks and hydrocarbon lakes,[5] Enceladus, which emits jets of gas and dust from its south-polar region,[6] and Iapetus, with its contrasting black and white hemispheres. The moons of the Norse group also orbit in the opposite direction to Saturn's rotation. S/2004 S 28 • They are trojan moons of Dione (Helene) and Tethys (Telesto and Calypso). Saturn appears to sit in a nest of rings in this composite of 45 images Cassini took on May 9, 2007. This is Cassini's final resting place. Thyone • J. [21], Two moons were claimed to be discovered by different astronomers but never seen again. Caliban • Das Saturn II ist das Zelt, dass sich sehr einfach Öffnen und Schließen lässt. And if it's been moving away from the planet at a rapid rate each year, Titan was likely much closer to Saturn in the beginning billions of years ago before migrating. Im Gegensatz zu den Kometen wird Enceladus aber von innen erwärmt.

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