Using the Hubble Space Telescope data, the researchers found in the atmosphere of water vapor, which is formed as a result of ice sublimation on the surface.
Earlier, astronomers found that on the largest satellite of Jupiter water more than on Earth. However, due to low temperatures on the surface, it freezes, and in a liquid form can only be at a depth of more than 150 km, where it cannot evaporate. Nevertheless, scientists have discovered a significant content of water vapor in its atmosphere.
Back in 1998, the telescope spectrograph recorded the accumulation of electrified gas on the satellite, but then they were taken for molecular and atomic oxygen, although it did not correspond to the other observed features. After 20 years of astrophysics from the Royal Institute of Technology in Stockholm, there was a new study in Stockholm, and they were surprised that in the atmosphere of Gameda there are practically no atomic oxygen, which destroyed the previous explanation of the spectral analysis.
Studying other features of the satellite, the same team recently noticed that the indicators vary significantly during the day and significantly increase in the equator area at noon. Based on this, they suggested that the accumulations of electrified gas are clouds of water vapor formed as a result of sublimation (the process of transition of water from solid immediately into a gaseous state, bypassing the liquid phase) under the action of solar radiation.
Gamorn is one of the nearest cosmic bodies, potentially suitable for human habitat. Therefore, this discovery is important for the future mission of the European Space Agency, the launch of which is scheduled for 2022.
After the JUICE device gets to Jupiter by 2029, he will observe the planet and its largest satellites for at least three years. In addition to the analysis of their physical characteristics, the collected data will help astronomers understand whether we can ever colonize this icy world.
Last month, astrophysics from Arizona university made a much more intriguing discovery on Saturn’s satellite. Flying through the loops from the jets of geysers Enceladus, Cassini spacecraft recorded in them unusual
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