Complex macromolecular organics were detected in a jet plume from Enceladus in 2018. Enceladus Moon Facts.
[53], Impact cratering is a common occurrence on many Solar System bodies. Castillo et al. The next full Moon will be midday on Monday, August 3, 2020. [154][155][156], The presence of ample hydrogen in Enceladus's ocean means that microbes – if any exist there – could use it to obtain energy by combining the hydrogen with carbon dioxide dissolved in the water. It is mentioned that both Athena and Zeus may have killed Enceladus, as well as Dionysus, the God of Wine and son of Zeus. It is only 311 miles (500 km) in diameter, the sixth largest of Saturn's moons. Bill Dunford, A 3D model of Saturn's moon Enceladus, an icy moon with a hidden subsurface ocean.
Like many other satellites in the extensive systems of the giant planets, Enceladus is trapped in an orbital resonance.
Underneath Enceladus’s ice sheets is lots and lots of water. There is no proof of life there, but future missions could test for life signs.
[47] Analysis of the CDA and INMS data suggest that the gas cloud Cassini flew through during the July encounter, and observed from a distance with its magnetometer and UVIS, was actually a water-rich cryovolcanic plume, originating from vents near the south pole. Viscously relaxed craters tend to have domed floors, or are recognized as craters only by a raised, circular rim.
William Herschel's son John Herschel suggested the name in his 1847 publication Results of Astronomical Observation made at the Cape of Good Hope, in which he suggested names for the first seven Saturnian moons discovered. Another region of smooth plains to the southwest of Sarandib is criss-crossed by several troughs and scarps.
In 2015, the Cassini probe made a close fly-by of Enceladus's south pole, flying within 48.3 km (30 mi) of the surface, as well as through a plume in the process. [104][127] Reducing the freezing point of water with ammonia would also allow for outgassing and higher gas pressure,[128] and less heat required to power the water plumes. All in all, Enceladus is actually one of the moons of Saturn that we know quite a lot about.
In other areas, these bands bow upwards with fractures and ridges running the length of the feature. These ridges are relatively limited in extent and are up to one kilometer tall. Unlike Earth's Moon, Enceladus does not appear to librate more than 1.5° about its spin axis. 16, EGU2014-9492-1, "A Perspective on Life on Enceladus: A World of Possibilities", "Warm Oceans on Saturn's Moon Enceladus Could Harbor Life", Habitability of Enceladus: Planetary Conditions for Life, "Cassini finds molecular hydrogen in the Enceladus plume: Evidence for hydrothermal processes", "Conditions for Life Detected on Saturn Moon Enceladus", "NASA: Ocean on Saturn moon may possess life-sustaining hydrothermal vents", "NASA finds more evidence that the ocean on Enceladus could support alien life", "NASA Missions Provide New Insights into 'Ocean Worlds, "NASA finds ingredients for life spewing out of Saturn's icy moon Enceladus", "Enceladus: Evolution and Possible Relationship to Saturn's E-ring", "Saturn's Geyser Moon Shines in Close Flyby Views", "Cassini Completes Final Close Enceladus Flyby", "Deepest-Ever Dive Through Enceladus Plume Completed", "Cassini Images of Enceladus Suggest Geysers Erupt Liquid Water at the Moon's South Pole", "The search for life – from Venus to the outer solar system", "Signs of Europa Plumes Remain Elusive in Search of Cassini Data", "A lander mission to probe subglacial water on Saturn's moon Enceladus for life", "Exciting New 'Enceladus Explorer' Mission Proposed to Search for Life", "Searching for life in the depths of Enceladus", "Diverse destinations considered for new interplanetary probe", "Saturn Moon Enceladus Eyed for Sample-Return Mission", "TandEM (Titan and Enceladus Mission) Workshop", "Private mission may get us back to Enceladus sooner than NASA", "NASA to support initial studies of privately funded Enceladus mission", NASA to support initial studies of privately funded Enceladus mission, Billionaire aims to jump-start search for alien life and rewrite rules of space exploration, A different trajectory for funding space science missions, Titan and Enceladus $1B Mission Feasibility Study, "Planetary Science Decadal Survey Enceladus Orbiter", "Discovery Missions for an Icy Moon with Active Plumes", "IceMole Drill Built to Explore Saturn's Icy Moon Enceladus Passes Glacier Test", "LIFE – Enceladus Plume Sample Return via Discovery", "LIFE: Life Investigation For Enceladus – A Sample Return Mission Concept in Search for Evidence of Life", "Explorer of Enceladus and Titan (E2T): Investigating the habitability and evolution of ocean worlds in the Saturn system", "Cassini: The legend and legacy of one of NASA's most prolific missions", Paul Schenk's 3D images and flyover videos of Enceladus and other outer solar system satellites, Images of Enceladus at JPL's Planetary Photojournal, https://en.wikipedia.org/w/index.php?title=Enceladus&oldid=983619961, Short description is different from Wikidata, Creative Commons Attribution-ShareAlike License, 'Titan and Enceladus $1B Mission Feasibility' Study, This page was last edited on 15 October 2020, at 08:04. It orbits around Saturn every 1.37 days at an average distance of 148,000 miles (238,000 km). Kristen Erickson Numerous fractures were found within the older, cratered terrain, suggesting that the surface has been subjected to extensive deformation since the craters were formed.
Optical illusions from a combination of viewing direction and local fracture geometry previously made the plumes look like discrete jets.
[69][70][71] This is consistent with geophysical calculations which predict the south polar fissures are under compression near periapsis, pushing them shut, and under tension near apoapsis, pulling them open. [122] A more recent analysis claimed that "a model of the tiger stripes as tidally flexed slots that puncture the ice shell can simultaneously explain the persistence of the eruptions through the tidal cycle, the phase lag, and the total power output of the tiger stripe terrain, while suggesting that eruptions are maintained over geological timescales. [49] [81][82] These radionuclides, like aluminium-26 and iron-60, have short half-lives and would produce interior heating relatively quickly. Consequently, its surface temperature at noon only reaches −198 °C (−324 °F), far colder than a light-absorbing body would be. Results from the visual and infrared spectrometer (VIMS) instrument suggest that the green-colored material surrounding the tiger stripes is chemically distinct from the rest of the surface of Enceladus. μ The Cassini mission did close flybys of this moon, to map its surface in high resolution.
[84][82] Subsequent radioactive and tidal heating would raise the temperature of the core to 1,000 K, enough to melt the inner mantle. 38
Saturn’s sixth-largest moon, Enceladus has a diameter of only 310 miles (500 kilometers), and a mass less than 1/50,000 that of Earth.
[6] Enceladus orbits within the densest part of Saturn's E ring, the outermost of its major rings, and is the main source of the ring's material composition. This makes it only 1/200th the size of the planet Saturn, and around 1/10th the size of Saturn’s biggest moon. There are more than one hundred different geysers on the surface of Enceladus.
(See 'Composition' section.) The farthest Enceladus to gets from Saturn is 148,605 miles (apogee). [6] However, the current shape also supports the possibility that Enceladus is not in hydrostatic equilibrium, and may have rotated faster at some point in the recent past (with a differentiated interior). [39]
[40], Plumes from Enceladus, which are similar in composition to comets,[25] have been shown to be the source of the material in Saturn's E ring. NASA's Lunar Flashlight, a briefcase-sized satellite, or CubeSat, will detect surface ice believed to be at the bottom of craters on the Moon that have never been exposed to sunlight.
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