Ganymede


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Ganymede

(găn`ēmēd'), in astronomy, one of the moons, or natural satellites, of JupiterJupiter
, in astronomy, 5th planet from the sun and largest planet of the solar system. Astronomical and Physical Characteristics

Jupiter's orbit lies beyond the asteroid belt at a mean distance of 483.6 million mi (778.
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; the largest natural satellite in the solar system, it is larger than the planet Mercury.

Ganymede,

in Greek mythology, a youth of great beauty. He was carried off by Zeus to be cupbearer to the gods.

Ganymede

(gan -ă-meed) The brightest and largest of the four Galilean satellites of Jupiter. With a diameter of 5262 km it is the largest satellite in the Solar System. It is in fact larger in diameter than the planet Mercury but is only half as massive. It has an albedo of 0.42 and a density of 1.94 g cm–3. There are two main types of surface feature: ancient darkish heavily cratered terrain and the younger brighter regions, which have long parallel grooves or sulci. The two types intermingle, giving a complex surface. The largest single feature on Ganymede is the vast dark area Galileo Regio with a diameter of 4000 km. The most ancient craters – ghost craters or palimpsests – are barely visible in the dark areas such as Galileo Regio. Some of the younger craters are surrounded by bright rays of exposed ice. The grooved terrain consists of parallel mountain ridges up to 1 km high, 10 to 15 km apart, which wander for thousands of kilometers across the surface forming intricate patterns. From data collected by the Galileo spacecraft, scientists have surmised that Ganymede's internal structure consists of three layers: a compact core consisting of molten iron or iron and sulfur, a surrounding mantle made up of rocky silicates, and an outer shell of ice. As in the case of Europa and Callisto, evidence has been discovered of a tenuous oxygen atmosphere, resulting from charged solar particles breaking down water molecules in the icy crust. See also Jupiter's satellites; Table 2, backmatter.

Ganymede

 

in ancient Greek mythology, a beautiful Trojan youth who because of his unusual beauty was abducted by Zeus and taken to Mount Olympus, where he became the favorite of Zeus and cupbearer to the gods. Around the fourth century B.C., a motif of the abduction of Ganymede by an eagle appears. The eagle in late classical tradition is identified with Zeus himself. The abduction of Ganymede is a frequent subject in the fine arts—the works of Leochares, Correggio, Rembrandt, Thorvaldsen, and others.


Ganymede

 

the largest satellite of the planet Jupiter (measuring 5,150 km in diameter) and fourth in distance from the planet (1,070,000 km). Ganymede, one of Jupiter’s four large satellites, was discovered in 1610 by the Italian scientist Galileo.

Ganymede

[′gan·ə‚mēd]
(astronomy)
A satellite of Jupiter orbiting at a mean distance of 664,000 miles (1,071,000 kilometers). Also known as Jupiter III.

Ganymede

beautiful shepherd entrances Jupiter. [Rom. Lit.: Metamorphoses]

Ganymede

mortal lad, taken by Zeus to be cupbearer to the gods. [Gk. Myth.: Howe, 106]
See: Servant
References in periodicals archive ?
Ganymede contains ice and Titan also has a dense atmosphere.
Il serait depuis represente par la constellation du verseau, et le nom de Ganymede a ete donne a un des quatre satellites galileens de Jupiter, decouvert en 1610 par Galilee et l'astronome allemand Simon Marius.
That's because Ganymede is 5,262 km (3,270 miles) in diameter, while Io is only 69% as wide and therefore presents only half as much surface area to block sunlight.
A deep ocean under the icy crust of Ganymede opens up further exciting possibilities for life beyond Earth.
The finding resolves a mystery about the largest moon in the solar system after NASA's now-defunct Galileo spacecraft provided hints that Ganymede has a subsurface ocean during exploration of Jupiter and its moons from 1995 to 2003.
The research suggested that characteristic patterns of ridges and troughs, called grooved terrain on Ganymede, resulted from its surface being stretched.
Basing on models of Ganymede, NASA cited scientists first suspected an ocean in the largest moon in outer space in the 1970s.
According to NASA, Ganymede is only one of five moons in the solar system thought to support vast oceans beneath icy crusts.
Thus and so, in the gleaming palace of Olympus, where the light never fades and where the gods and goddesses rule from their golden thrones, Ganymede became the honored water-bearer of the universe.
This debut novel of intrigue, international terrorism, and covert missions, by author Terrence Douglas, depicts strong characters that introduce Ganymede.
Visits will be made to the planet's three biggest moons, Ganymede, Callisto and Europa which were first discovered by Galileo in 1610 along with a volcanic moon called Io.
1) In As You Like It, the fact that Ganymede is in fact female resolves the problem of Phebe's attraction to Rosalind, allowing the play to end with the marriages of four couples.