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Jupiter’s moon Ganymede may harbor extraterrestrial life, scientists say

If not for the fact that this celestial body is a satellite of the planet Jupiter, due to its huge size, it could well pass for a planet. The diameter of Ganymede is more than 5200 km, which is even larger than Mercury and only slightly smaller than Mars.

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In March 2016, the Hubble Space Telescope also made a surprising discovery that indicates the existence of a large ocean of salt water on the moon.

And, as far as we know, the presence of liquid water is vital, as it may indicate the existence of alien life.

“This discovery marks an important milestone, highlighting what only Hubble can achieve,” said John Grunsfeld, former NASA Science Mission Directorate Associate Administrator.

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Planetologists believe Ganymede could be one of the places where extraterrestrial life can be found in our solar system, besides Earth.

“During its 25 years in orbit, Hubble has made many scientific discoveries in the solar system. Deep in the ocean beneath Ganymede’s icy crust lie more interesting possibilities for life beyond Earth.”

“We believe that the ocean of Ganymede contains more water than Europe,” explains Olivier Vitasse, scientist who oversees the ESA mission Jupiter Ice Moon Explorer. “The oceans of Ganymede have six times as much water as Earth and three times as much as Jupiter’s moon Europa.”

As another Juice mission scrutinizes Ganymede and Europa, another NASA mission, dubbed Clipper, will focus on exploring the latter.

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Thus, in a few years, we will have a complete panorama of the oceanic satellites surrounding the largest planets in the solar system.

Ganymede is the largest planetary moon in the entire solar system and the only one that has its own magnetic field. Thanks to the magnetic field at the poles of Ganymede, the northern lights are perfectly observed. The satellite is within the magnetic field of Jupiter, which is why the northern lights periodically change.

The discovery of a huge body of water under the moon’s icy landscape has increased the chances of detecting extraterrestrial life without leaving the solar system, scientists say.

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Jake Carter

Jake Carter is a researcher and a prolific writer who has been fascinated by science and the unexplained since childhood. He is always eager to share his findings and insights with the readers of, a website he created in 2013.