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Hubble finds 'best evidence' for Ganymede subsurface ocean

There is further, compelling evidence that Ganymede - the largest moon in the Solar System - has an ocean of water beneath its icy crust.
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NASA's Hubble Observations Suggest Underground Ocean on Jupiter's Largest Moon

NASA's Hubble Space Telescope has the best evidence yet for an underground sal****er ocean on Ganymede, Jupiter's largest moon. The subterranean ocean is thought to have more water than all the water on Earth's surface.
Identifying liquid water is crucial in the search for habitable worlds beyond Earth and for the search for life as we know it.

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NASA Holds Teleconference on Hubble Observations of Jupiters Largest Moon

NASA will host a teleconference at 11 a.m. EDT on Thursday, March 12, to discuss Hubble Space Telescope's observations of Ganymede, Jupiter's largest moon. These results will help scientists in the search for habitable worlds beyond Earth.
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Largest Solar System Moon Detailed in Geologic Map: Rotating Globe of Ganymede Geology

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Largest Solar System Moon Detailed in Geologic Map

More than 400 years after its discovery by astronomer Galileo Galilei, the largest moon in the solar system - Jupiter's moon Ganymede - has finally claimed a spot on the map.
A group of scientists led by Geoffrey Collins of Wheaton College has produced the first global geologic map of Ganymede, Jupiter's seventh moon. The map combines the best images obtained during flybys conducted by NASA's Voyager 1 and 2 spacecraft (1979) and Galileo orbiter (1995 to 2003) and is now published by the U. S. Geological Survey as a global map.

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Galileo Galilei discovered Ganymede on January 13, 1610. 



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The Galileo spacecraft made a second flyby of Ganymede on the 6th September, 1996
The Galileo craft made six close flybys of Ganymede from 1995-2000 (G1, G2, G7, G8, G28 and G29) and discovered that Ganymede has a permanent (intrinsic) magnetic moment independent of the Jovian magnetic field. The value of the moment is about 1.3 x 10¹³ T·m³, which is three times larger than the magnetic moment of Mercury. The magnetic dipole is tilted with respect to the rotational axis of Ganymede by 176°, which means that it is directed against the Jovian magnetic moment. Its north pole lies below the orbital plane.

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Astronomers unveil map of Jupiter's Ganymede moon

In a combination of spacecraft surveys, an astronomy team has unveiled a geologic map of Jupiter's largest moon, the frozen world of Ganymede.
In the journal Icarus, a team led by G. Wesley Patterson of Johns Hopkins University's Applied Physics Laboratory in Laurel, Md., combined data and images from past Voyager and Galileo missions to Jupiter.

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Ed ~ See Calendar section


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