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This supports the hypothesis that K2-18b could indeed have a water ocean. The same observations also suggest that K2-18b's atmosphere might contain dimethyl sulfide, a compound associated with life on Earth, although this has yet to be confirmed. [19] Another possibility is that K2-18b is a lava world with a hydrogen atmosphere. [20]
Evidence suggests that hydrogen peroxide is abundant across much of the surface of Europa. [192] Because hydrogen peroxide decays into oxygen and water when combined with liquid water, the authors argue that it could be an important energy supply for simple life forms.
Jupiter's helium abundance is 80% of the Sun's, similar to Saturn's composition. The ongoing contraction of Jupiter's interior generates more heat than the planet receives from the Sun. Its internal structure is believed to consist of an outer mantle of fluid metallic hydrogen and a diffuse inner core of denser material.
Jupiter, too, has trace amounts of hydrogen sulfide in its atmosphere. This planet is about 10% larger than Jupiter in diameter and mass. In addition to detecting hydrogen sulfide, a sulfur ...
NASA's Juno spacecraft captured this view of Jupiter during the mission's 54th close flyby of the giant planet Sept. 7, 2023.
The methane abundance relative to molecular hydrogen in the stratosphere is about 10 −4, [16] while the abundance ratio of other light hydrocarbons, like ethane and acetylene, to molecular hydrogen is about 10 −6. [16] Jupiter's thermosphere is located at pressures lower than 1 μbar and demonstrates such phenomena as airglow, polar aurorae ...
Hydrogen peroxide is a chemical compound with the formula H 2 O 2.In its pure form, it is a very pale blue [5] liquid that is slightly more viscous than water.It is used as an oxidizer, bleaching agent, and antiseptic, usually as a dilute solution (3%–6% by weight) in water for consumer use and in higher concentrations for industrial use.
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