Ganymede has been visited by the voyager probes in 1979 and the Galileo probe in the 1990s, both of which returned data about this satellite. Ganymede's Atmosphere The Galileo mission discovered that Ganymede not only has a magnetosphere, but its own atmosphere as well, although it is very, very thin. Ganymede is the third of the Galilean moons, orbiting Jupiter. In Greek mythology, Ganymede was a beautiful young boy who was taken to Olympus by Zeus disguised as an eagle. Additional evidence of an oxygen atmosphere on Ganymede comes from the spectral detection of gases found in the ice crust on Ganymede’s surface. It is believed that the lighter region disrupted geology could be due to tectonic activity caused by tidal heating. A salty ocean is believed to lie beneath its surface.
The remainder is covered by lighter regions of grooved terrain and ridges. © 2017 Actforlibraries.org | All rights reserved Oxygen is believed to be produced when water ice is split into hydrogen and oxygen by the process of radiation. Exploration of Ganymede began with Pioneer 10 and Pioneer 11.
Another instrument detected the existence of an ionosphere, suggesting that there must be an active process creating Ganymede’s atmosphere. Ganymede is the only satellite known to possess a magnetosphere, which is thought to stem from the convection process created within the liquid iron core.
In 1995, Hubble Space Telescope (HST) observed a tiny airglow of atomic oxygen in the atmosphere of Ganymede suggesting a neutral atmosphere composed primarily of O2 molecules.
Together they are referred to as the Galilean moons. The Galileo mission discovered that Ganymede had not only a magnetosphere like the one found on Earth, but a very thin atmosphere as well.
The magnetic field causes auroras, which are ribbons of glowing, electrified gas, in regions circling the moon’s north and south poles. Scientists discovered Irregular lumps beneath the icy surface which may be rock formations supported by Ganymede icy crust. Ganymede has large, bright regions of ridges and grooves that slice across older, darker terrains. These grooved regions are a clue that the moon experienced dramatic upheavals … The atmosphere is created when molecules from the magnetosphere, moving very fast, hit the surface and knock out a water molecule. Europa´s Ocean is much closer to its surface and in more direct contact with hydrothermal processes on the seafloor. The discovery of these four Galilean satellites are what eventually led to the understand that the planets in the solar system were orbiting the Sun and that Earth was not the centre of the solar system. Ganymede is composed primarily of silicate rock and water ice. A saltwater ocean is believed to exist 200 km beneath its surface. Images taken by Galileo probe show how water may have surfaced through the fractured crust, resembling the linear features seen in Europa (second Galilean moon) which is believed to have a water ocean beneath its ice crust. The atmosphere is produced by fast moving molecules from the magnetosphere, colliding with the surface and knocking out a water molecule. Ganymede was discovered by Galileo Galilei in 1610. Voyager took measurements of its size, and Galileo spacecraft discovered an underground ocean and magnetic field. Ganymede´s atmosphere consists of oxygen, O, O2 and possibly ozone (O3) Atomic hydrogen might exist in trace amounts. Galileo instruments detected a stream of hydrogen molecules moving away from Ganymede over its north pole. One third is covered by dark regions of highly cratered terrain. Close approaches of the Galileo probe on Ganymede on May 2000 suggested a thick layer of melted, salty water. It is the largest Moon in the solar system with a diameter of 3,280 miles (5,262 km). About & Disclaimer | Terms | Privacy | Contact, Facts about the third Moon from Jupiter Ganymede, Was the Bird Flu really a Biological Weapon. Ganymede´s surface consist of two main types of terrain.
The Ganymedean Ocean is similar in many respects to that of Callisto, and different to that of Europa. Europa Jupiter System Mission (EJSM) is a new mission to Jupiter´s moons planned to be launch in 2020. Ganymede´s atmosphere consists of oxygen, O, O2 and possibly ozone (O3) Atomic hydrogen might exist in trace amounts. It was the first satellite discovered orbiting other planet than the Earth. The Galileo mission discovered that Ganymede had not only a magnetosphere like the one found on Earth, but a very thin atmosphere as well. Ganymede´s structure is composed principally of silicate rocks and water ice. It is the only Moon in the entire solar system known to possess a magnetosphere.
Ganymede´s Ocean is deeper and inserted between layers of ice, making it less likely to support life; however, magmatic activity might still generate pockets of water melt, supplying the ocean with nutrients to sustain a biosphere.
Minerals found on the surface of Ganymede indicate that water may have emerged and melted at the surface. Ganymede was discovered by Galileo Galilei on 7 January 1610 along with the three other Jovian moons Europa, Io and Callisto. Natural radioactivity should provide heat enough to maintain a stable layer of liquid water between layers of ice 150-200 km (90-120 miles) below Ganymede´s surface. Ganymede is the largest moon in our solar system and the only moon with its own magnetic field. Ganymede became the cup bearer of the Olympian Gods.
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