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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]
During the G1 flyby in 1996, Galileo instruments detected Ganymede's magnetic field. [116] Data from the Galileo flybys was used to discover the sub-surface ocean, which was announced in 2001. [23] [40] High spatial resolution spectra of Ganymede taken by Galileo were used to identify several non-ice compounds on the surface. [52]
Galileo Regio 4,440: 1979: Galileo ... Greek; Zeus set Ganymede among the stars as the constellation of Aquarius, the water carrier. WGPSN: Arbela Sulcus
In this phase Juno began to examine Jupiter's inner moons, Ganymede, Europa and Io. A flyby of Ganymede occurred on June 7, 2021, 17:35 UTC, coming within 1,038 km (645 mi), the closest any spacecraft has come to the moon since Galileo in 2000. [23] [24] [57] A flyby of Europa took place on September 29, 2022, at a distance of 352 km (219 mi).
This is a category of discoveries by Galileo Galilei. See parent category for proper sortkey usage instructions. ... Ganymede (moon) I. Io (moon) P. Phases of Venus; R.
Galileo Regio is a large, dark surface feature on Jupiter's moon Ganymede. [1] It is a region of ancient dark material that has been broken apart by tectonism and is now surrounded by younger, brighter material (such as that of Uruk Sulcus) that has been upwelling from Ganymede's interior. It is thought to be some 4 billion years old and is ...
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 ...
Memphis Facula / ˈ m ɛ m f ɪ s ˈ f æ k j ʊ l ə / is a palimpsest, or "ghost crater", on Ganymede, the largest of the Jovian satellites.. About 360 km across, [2] it is situated in the southwestern part of Galileo Regio, a huge almost circular dark region in Ganymede's northern hemisphere.