water vapor discovered on its moon Ganymede

Jupiter’s icy satellite Ganymede is the largest moon in the solar system. But also the third in order of distance from the “ Galilean moons ” or “ Galilean satellites ” of the planet Jupiter. Ganymede’s interest, according to the research astronomers, lies in the primary role the moon plays in the Galilean satellite system and its unique magnetic and plasma interactions with Jupiter and its environment. But also in the fact that it provides a natural laboratory for the analysis of the nature, evolution and potential habitability of frozen worlds in general. In a publication this Monday in the scientific journal Nature Astronomy, NASA astronomers reported their discovery.

Water vapor in the fragile atmosphere of the frozen moon …

This Monday, in their publication in the scientific journal NASA, the researchers explained their discovery: Water vapor in the atmosphere held by the icy moon. An important discovery, as it gave scientists on the basis of interesting work on the creation of life on planets and, of course, on the means of preserving it as much as possible. The apparent detection of water vapor came after researchers compared two Ganymede sightings in 1998 with another set of sightings made in 2018.

The team’s analysis combined data from two instruments: the Hubble Cosmic Origins Spectrograph in 2018 and archival images from the Space Telescope Imaging Spectrograph (STIS) from 1998 to 2010. An analysis that has enabled scientists to understand that ice in On Ganymede’s surface, ice produced at temperatures as low as -185 ° C could, under the action of the Sun, evaporate. Water vapors observed while the action of the sun was at its maximum on the planet, that is, at noon.

Suddenly according to scientists, the observation of this phenomenon, allowed to better understand the Jovian system, unravel its history, from its origin to the possible appearance of habitable environments and of course to “better understand how the gas giant planets and their satellites are form and evolve. ”In addition, according to NASA,“ new information on the habitability of Jupiter-type exoplanetary systems is expected to be found, ”in particular during the JUICE mission, which is scheduled to launch in 2022. A large-scale research mission of the European Area Agency (ESA).

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