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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 discovery was announced in the Sidereus Nuncius ("Starry Messenger"), published in Venice in March 1610, less than two months after the first observations. On 12 March 1610, Galileo wrote his dedicatory letter to the Duke of Tuscany, and the next day sent a copy to the Grand Duke, hoping to obtain the Grand Duke's support as quickly as ...
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]
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 ...
Ganymede: Jupiter III Galileo [9] [10] discovered the Galilean moons. These satellites were the first celestial objects that were confirmed to orbit an object other than the Sun or Earth. Galileo saw Io and Europa as a single point of light on 7 January 1610; they were seen as separate bodies the following night. [11] Callisto: Jupiter IV o: 8 ...
Galileo performed three additional flybys of Io, on August 6 and October 16, 2001 and January 17, 2002, during the Galileo Millennium Mission. Both encounters in 2001 allowed Galileo to observe Io's polar regions up-close, though imaging from the August 2001 flyby was lost due to a camera malfunction. [2]
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Agua Hedionda Lagoon Discovery Center: Carlsbad: San Diego: Natural history, ecology and cultural history of the 400-acre lagoon and surrounding area Alum Rock Science and Nature Center: San Jose: Santa Clara: Operated by the Youth Science Institute in 720-acre Alum Rock Park, natural history exhibits, live animals American River Nature Center ...