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Ganymede: A Moon Like No Other

Dragon
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Post by Dragon Mon Apr 30, 2018 10:47 pm

Ganymede: A Moon Like No Other Imgpsh_fullsize
Image Credit: NASA/JPL

Far across the solar system, where Earth appears merely as a pale blue dot, NASA’s Galileo spacecraft spent eight years orbiting Jupiter. During that time, the mission made a host of discoveries on the gas giant’s moons, including the observation of a magnetic environment around Ganymede that was distinct from Jupiter’s own magnetic field. The mission ended in 2003, but newly resurrected data from Galileo’s first flyby of Ganymede is yielding new insights about the largest moon in our solar system, and its environment — which is unlike any other.

Source / Image Courtesy


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Post by Dragon Mon Apr 30, 2018 10:48 pm



This is a video clip of what Ganymede looks like, based on images from NASA's Galileo orbiter. The US Geological Survey has classified the surface of Ganymede into the types of terrain.

The brown regions are those that are heavily cratered and much older than the light shaded regions that are smoother with few craters.

These lighter shaded regions are believed to be formed by flooding of the surface with water coming from faults or even cryo-volcanos that have taken place over billions of years.

Perhaps even tectonic processes are at work with some crustal ice sheets being forced downward by the emergence of newer icy material. Over 8 years at Jupiter Galileo spacecraft made 6 close flyby of the Ganymede and detected a magnetic field coming from the moon itself.

In addition, the best models of Ganymede from the Galileo data showed a deep ocean under a thick ice crust.


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Post by Dragon Mon Apr 30, 2018 10:50 pm



Here are some strange sounds heard in the magnetosphere when the Galileo spacecraft flew by Jupiter's moon, Ganymede.


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Ganymede: A Moon Like No Other Empty Re: Ganymede: A Moon Like No Other

Post by Cloud Wed May 02, 2018 12:54 am

Dragon wrote:These lighter shaded regions are believed to be formed by flooding of the surface with water coming from faults or even cryo-volcanos that have taken place over billions of years.

:goodposting: :goodposting: Very interesting

Dragon wrote:In addition, the best models of Ganymede from the Galileo data showed a deep ocean under a thick ice crust.


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