[44] It is estimated that the A Ring contains 7,000–8,000 propellers larger than 0.8 km in size and millions larger than 0.25 km. Eukelade • Enceladus wurde am 28. Iapetus • The Norse (or Phoebe) group consists of 46 retrograde outer moons. Trinculo • Saturn's largest moon, Titan, was discovered in 1655 by Christiaan Huygens using a 57-millimeter (2.2 in) objective lens[12] on a refracting telescope of his own design. A dozen of these minuscule moons were discovered using what was then the largest reflecting telescope in the world, on Mauna Kea in Hawaii. [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. Space.com. We increased the orbital frequency of Saturn’s major moons by 27 octaves and played the resulting notes on a Rhodes electric piano, once every orbit. [32] In 2019, twenty new irregular satellites of Saturn were reported, resulting in Saturn overtaking Jupiter as the planet with the most known moons for the first time since 2000. Saturn's moon Enceladus above the planet's rings. Enceladus besitzt somit Wärme, Wasser und organische Chemikalien, einige der wesentlichen Bausteine für die Entwicklung von Leben. Instead of colliding, however, their gravitational interaction causes them to swap orbits every four years.[47]. Cassini discovered Enceladus is an active moon with a global ocean of liquid salty water beneath its crust. Die Energiequelle für die vulkanischen Vorgänge ist unbekannt. S/2010 J 2 • The moon is the largest among the population of bodies that are sources of dust in this ring. But scientists are less certain about when the planet's signature rings and many moons formed. Naiad • [5] Die Namen aller Formationen des Trabanten wurden von der IAU auf solche aus Tausendundeine Nacht festgelegt.[6]. You can support StarDate radio by sponsoring our program for a day. Atlas • This is caused by the moon's gravity tugging on the planet, which creates a temporary bulge in the planet. The first of Saturn's satellites were discovered in the 17th century by the Italian-French astronomer Giovanni Cassini (1625-1712) and his Dutch contemporary Christiaan Huygens (1629-1695). CS1 maint: BOT: original-url status unknown (. S/2016 J 1 • Neben Einschlagkratern sind flache Ebenen sowie ausgeprägte Brüche und Verwerfungen sichtbar. [10], Am 9. Distance is from Saturn's centre to closest edge of ring, Saturn's moon Enceladus over Saturn's rings, DLR Institute of Planetary Research - Cassini-Huygens. [41] The innermost moons and most regular satellites all have mean orbital inclinations ranging from less than a degree to about 1.5 degrees (except Iapetus, which has an inclination of 7.57 degrees) and small orbital eccentricities. [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. doi:10.1089/ast.2014.1158. S/2004 S 25 • Furthermore, the atmosphere has high levels of nitrogen, methane, and hydrogen, together with significant amounts of other hydrocarbons. StarDate is brought to you in part through the generous support of our underwriters.Interested in underwriting? Sinope • Moon and Saturn II Look for Saturn to the right of the Moon tonight, shining like a bright star. Cressida • [18] This object is now known as Epimetheus, the eleventh moon of Saturn. Cassini took this image of Saturn's moon Titan in 2012. Man vermutete, sie könnten durch Vulkane, Geysire oder andere Aktivitäten ausgestoßen werden. Aufgrund der hohen Reflexion des Sonnenlichts herrschen auf Enceladus meist Temperaturen unter −200 °C bzw. S/2004 S 31 • Tarvos • Die Bahnexzentrizität beträgt 0,0047, die Bahn ist 0,019° gegenüber dem Äquator von Saturn geneigt, liegt also fast in der Äquatorebene des Planeten. August 2015. The comet P/2020 F1 (Leonard) is calculated to have made a close approach of 978000±65000 km (608000±40000 mi to Saturn on 8 May 1936, closer than the orbit of Titan to the planet, with an orbital eccentricity of only 1.098±0.007. S/2004 S 24 has the most distant prograde orbit of Saturn's known satellites. Some asteroids share the same names as moons of Saturn: 55 Pandora, 106 Dione, 577 Rhea, 1809 Prometheus, 1810 Epimetheus, and 4450 Pan. Planetary scientists now think Enceladus may possibly be hospitable to life. The spacecraft was about 700,000 miles (1.1 million kilometers) from Saturn when the images were taken. S/2003 J 23 • Am 9. That energy pushes the moon further away. The intent of the study was to eliminate production of the Saturn IB, and create a lower-cost heavy launch vehicle based on Saturn V hardware. S/2004 S 26 • The relatively large Hyperion is locked in a resonance with Titan. [37], During late July 2009, a moonlet, S/2009 S 1, was discovered in the B Ring,[4] 480 km from the outer edge of the ring, by the shadow it cast. The only irregular moon of Saturn where high-resolution images could be taken by Cassini is Phoebe. [47] These moons are coated with dusty material that has smoothed out their surfaces.[56]. [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. [55], Trojan moons are a unique feature only known from the Saturnian system. The photometric color may be used as a proxy for the chemical composition of satellites' surfaces. S/2004 S 38 • Mundilfari • Roboter soll auf Enceladus nach Leben suchen, Saturn's Enceladus moon hides 'great lake' of water, NASA Space Assets Detect Ocean inside Saturn Moon. Carpo • [37] The largest among these moons is Albiorix with an estimated size of about 32 km. This mosaic of nine images shows Saturn's moon Titan during Cassini's first very close flyby on October 26, 2004. Finally, we currently know of another 22 very irregularly shaped satellites which measure less than 10 km, including S/2005 S 2, recently discovered by Cassini. The first to be discovered in this manner, Phoebe, was found in 1899 by W.H. They often occur as collisional families or groups. Titan is the largest of Saturn’s moon. Together, these showed the shift in Titan's orbit as it moves outward. S/2004 S 28 • Saturn's shepherd moons are Pan (Encke gap), Daphnis (Keeler gap), Atlas (A Ring), Prometheus (F Ring) and Pandora (F Ring). Die Ausstoßrate ist am saturnfernsten Punkt schließlich drei bis vier Mal so hoch wie am saturnnächsten. The moons enter one by one from the inside-out: Mimas, Enceledus, Tethys, Dione, Rhea, and Titan. Fornjot • Mit 1,61 g/cm3 weist er die drittgrößte Dichte aller großen Saturnmonde auf (übertroffen nur von Phoebe und von Titan). Die geysirartigen Fontänen in der Südpolarregion waren bis in eine Höhe von 500 Kilometern zu beobachten. [41] Janus and Epimetheus have orbits with only a few kilometers difference in semi-major axis, close enough that they would collide if they attempted to pass each other. [18] It was later named Janus. The Cassini spacecraft was launched from Cape Canaveral, Florida, on a Titan IVB/Centaur rocket on October 15, 1997. Dabei flog Cassini durch frisch ausgestoßene Partikel. [34][35] Work has been done to recover many of them in surveys from 2009 onwards, but five – S/2004 S 13, S/2004 S 17, S/2004 S 12, S/2004 S 7, and S/2007 S 3 – still remain lost today. Isonoe • The moons of Saturn are numerous and diverse, ranging from tiny moonlets only tens of meters across to enormous Titan, which is larger than the planet Mercury. Der E-Ring, manchmal auch „Enceladus-Ring“ genannt, ist der äußerste der regulären Saturnringe. As well as photographically documenting the surface geology using the camera system on board the Cassini spacecraft, another principal objective of the Cassini-Huygens mission is to study the chemical and mineralogical composition of the planet's moons using the spectrometers onboard the Cassini probe (and in the case of Titan, the Huygens lander).

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