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The existence of a liquid, iron–nickel-rich core [71] provides a natural explanation for the intrinsic magnetic field of Ganymede detected by Galileo spacecraft. [82] The convection in the liquid iron, which has high electrical conductivity, is the most reasonable model of magnetic field generation. [23]
The internal structure of Ganymede. Galileo returned to Ganymede on orbits G7 and G9 in April and May 1997, and on G28 and G29 in May and December 2000 on the GMM. [217] Images of the surface revealed two types of terrain: highly cratered dark regions and grooved terrain sulcus. Images of the Arbela Sulcus taken on G28 made Ganymede look more ...
This was the closest of all the flybys of Io. The moon provided a gravity-assist necessary for Galileo ' s ultimate collision course with Jupiter. A safing event 28 minutes before closest approach prevented most of the planned data from being collected. Galileo ' s cameras were deactivated, after they had sustained irreparable radiation damage.
5th century BC — Democritus proposes that the bright band in the night sky known as the Milky Way might consist of stars. 4th century BC — Aristotle believes the Milky Way to be caused by "the ignition of the fiery exhalation of some stars which were large, numerous and close together" and that the "ignition takes place in the upper part of the atmosphere, in the region of the world which ...
The Galilean moons are named after Galileo Galilei, who observed them in either December 1609 or January 1610, and recognized them as satellites of Jupiter in March 1610; [2] they remained the only known moons of Jupiter until the discovery of the fifth largest moon of Jupiter Amalthea in 1892. [3]
The JUICE mission will study the Jupiter moons Europa, Callisto and Ganymede and was launched as an ESA L-class mission on April 14, 2023 on an Ariane 5 carrier rocket. In the late 2010s, the Europa Clipper became the main NASA mission to Europa with a significant difference in that it would be solar-powered and engage in multiple flybys of the ...
The solar system's largest moon, Ganymede, which orbits the largest planet, Jupiter, was hit by an asteroid four billion years ago that shifted the gas giant's satellite on its axis, new research ...
Neith crater is a crater on Jupiter's moon Ganymede, the largest moon in the solar system. Impact features like Neith have been called "penepalimpsests" by some investigators or "dome craters" by others and are considered to be transitional between craters and palimpsests. Palimpsests are bright, nearly circular patches that are believed to be ...