The ninth-largest object in the Solar System, it is the largest without a substantial atmosphere. Follow us @Spacedotcom , Facebook and Google+ . by Ivan Petricevic October 11, 2017. from Ancient-Code Website According to scientists, there are relatively good chances that alien life is hiding on Ganymede, one of the Jovian moon's which has the largest ocean in the Solar System. Alien life on Europa, Enceladus, & Ganymede The search for extraterrestrial organisms on Jupiter and Saturn’s moons March 24th 2015 | London | Bartu Kaleagasi. [94] The mantle, in turn, transported it to the surface by convection. However, it is too thin to support life as we know it; it is unlikely that any li NASA’s Hubble Space Telescope has the best evidence yet for an underground saltwater ocean on Ganymede, Jupiter’s largest moon. [114][115] If selected, it would be launched in 2024, though this schedule might be revised and aligned with JUICE. [117] However, the mission was canceled in 2005 because of budget cuts. [56] Another explanation is a remnant magnetization of silicate rocks in the mantle, which is possible if the satellite had a more significant dynamo-generated field in the past. The induced moment is directed radially to or from Jupiter following the direction of the varying part of the planetary magnetic field. Mummies are found inside Egyptian pyramids: Why are pyramids made? Reasons to quit smoking are plenty because it causes more than cancer, El Silbon: Young boy who killed his father and cursed to become ghost, https://www.facebook.com/scientificMysteries. Ganymede, larger than the planet Mercury, is the largest Jovian satellite.Its distinctive surface is characterized by patches of dark and light terrain (see Fig. The bright terrain has more icy composition than the dark terrain. [93] This relatively fast formation prevented the escape of accretional heat, which may have led to ice melt and differentiation: the separation of the rocks and ice. The surface number density and pressure were calculated from the column densities reported in Hall, et al. A large, dark region contains a series of concentric grooves, created during a period of geologic activity. Pioneer 10 approached in 1973 and Pioneer 11 in 1974,[26] and they returned information about the satellite. [87] Its diameter is 4–5 Ganymede radii. Ganymede could have easily been classified as a planet if it were not orbiting a planet but the Sun of our solar system. [109], The Europa Jupiter System Mission (EJSM) had a proposed launch date in 2020, and was a joint NASA and ESA proposal for exploration of many of Jupiter's moons including Ganymede. What would happen if time stopped? [68][94] Alternative theories explain Ganymede's greater internal heating on the basis of tidal flexing[95] or more intense pummeling by impactors during the Late Heavy Bombardment. The images were taken at a range of 97,680 to 109,439 kilometers (60,696 to 68,002 mi). m3,[22] which is three times larger than the magnetic moment of Mercury. It also deals in various other interesting topics from the fields as diverse as the human lifestyle to animals’ lives. [81], The interaction between the Ganymedian magnetosphere and Jovian plasma is in many respects similar to that of the solar wind and Earth's magnetosphere. the electric current generated due to the heat generated because of the motion of liquid iron in its core. Gravitational pulls from Jupiter’s next two moons, Europa and Ganymede, have tugged Io’s orbit into an oval shape. [102] Pioneer 10's closest approach was 446,250 km. [22] During the closest flyby—G2—Galileo passed just 264 km from the surface of Ganymede. We use cookies to ensure that we give you the best experience on our website. Ganymede was discovered by Galileo Galilei on Jan. 7, 1610. The likely “club sandwich” structure of subterranean Ganymede. Many of the 140,000 people who watched Tyler’s clip yesterday were quick to jump to conclusions. In the most recent observations, New Horizons, during its flyby of Jupiter in 2007, did the compositional mapping data of Ganymede. [48] The most recent close observations of Ganymede were made by New Horizons, which recorded topographic and compositional mapping data of Europa and Ganymede during its flyby of Jupiter in 2007 en route to Pluto. [79] In addition, heavy ions precipitate continuously on Ganymede's polar surface, sputtering and darkening the ice. The average density of Ganymede is 1.936 g/cm3. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks. [88] The Ganymedian magnetosphere has a region of closed field lines located below 30° latitude, where charged particles (electrons and ions) are trapped, creating a kind of radiation belt. Ganymede has undergone periods of tectonic processes much like those seen on Earth. Read More: Voyager Mission, the greatest space mission, fought hard for its approval. [22] Its existence is connected with the variation of the Jovian magnetic field near Ganymede. Take a look. The study suggests there may be a layer of salty water directly on top of Ganymede’s rocky … Fellow astronomer Simon Marius named it Ganymede for a Greek child who served as a cup-bearer to Zeus or Jupiter, king of the G… If you thought Mars was the best place in the solar system to find signs of life, you might need to think again. A lot more discoveries about Ganymede are awaiting. In a similar fashion, the Earth’s magnetic field generates. It could be a result of conducting material moving in its interior, i.e. As Io orbits around Jupiter, its oval-shaped orbit means that Jupiter’s extremely strong gravitational pull is stronger at some times during the orbital path, and weaker at … [94] This hypothesis explains why the two Jovian moons look so dissimilar, despite their similar mass and composition. The moon is about 4.5 million years old which is about as old as Jupiter. In addition, Saur said that the aruoral technique used for Ganymede can help identify life-friendly water on other planets (or moons) with subsurface oceans outside the Solar System. Voyager Mission, the greatest space mission, fought hard for its approval, Europa can sustain life, and here are the valid reasons for it, Snowiest Places on Earth that are must-visit if you love snow, Horror films based on true stories, making those movies more terrifying. It is a natural phenomenon, and can be expected to appear whenever there is a planet whose conditions duplicate those of the Earth.” In addition, the Galileo spacecraft orbited Jupiter from 1995 to 2003, obtaining a large amount of Ganymede image data. The scientists want to explore more about the evolution of the icy world, its ocean, its interior, surface, and magnetic field. [104] The grooved terrain was also seen. It comprises about one-third portion of the moon. It roughly takes seven Earth days to Ganymede to complete its one orbit around Jupiter. Why not scuba dive with sharks? The subterranean ocean is thought to have more water than all the water on Earth's surface. [8], The radiation level at the surface of Ganymede is considerably lower than at Europa, being 50–80 mSv (5–8 rem) per day, an amount that would cause severe illness or death in human beings exposed for two months. The subterranean ocean is thought to … Prior to the new study, Ganymede’s rocky sea bottom was thought to be coated with ice, not liquid — a problem for the emergence of life. [114], A Ganymede orbiter based on the Juno probe was proposed in 2010 for the Planetary Science Decadal Survey. Although many alternative theories propose that other biochemical environments, such as the methane lakes found on Saturn’s moon Titan, could also hold the necessary hydrocarbons to harb… Redirect This redirect does not require a rating on the project's quality scale. [66] In this respect, Ganymede is different from Callisto, which apparently failed to melt and differentiate early due to loss of the accretional heat during its slower formation. If you continue to use this site we will assume that you are happy with it. Low gravity and lack of strong winds would seem to be common elements between growing conditions on Ganymede and Titan. Ganymede has large, bright regions of ridges and grooves that slice across older, darker terrains. [36] These flybys are denoted G1, G2, G7, G8, G28 and G29. In February 2009 it was announced that ESA and NASA had given this mission priority ahead of the Titan Saturn System Mission. Read More: Europa can sustain life, and here are the valid reasons for it. [22], The permanent magnetic moment carves a part of space around Ganymede, creating a tiny magnetosphere embedded inside that of Jupiter; it is the only moon in the Solar System known to possess the feature. NASA announced last week that Jupiter’s Ganymede, the largest moon in the solar system, may have multiple oceans of liquid water under the surface. Once again NASA has announced that life must have had at least a shot at getting going on an astral body other than Earth. Since Ganymede is the largest moon of Jupiter, it is also the most massive moon of both Jupiter and Solar system.
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