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CAPE CANAVERAL, Fla. (AP) — New analysis suggests there’s much less oxygen on the icy floor of Jupiter’s moon Europa than thought — and that would have an effect on what if any life is perhaps lurking within the moon’s underground ocean.
Even with little or no oxygen, microbes would possibly nonetheless be bustling round within the ocean believed to exist miles (kilometers) beneath Europa’s frozen crust. As for what else, “who is aware of,” stated NASA scientist Kevin Hand, who was not concerned within the research revealed Monday in Nature Astronomy.
Extra work is required to verify these findings, that are opposite to earlier telescope observations of condensed oxygen in Europa’s ice, indicating a better oxygen focus, stated Hand.
The brand new research is predicated on knowledge collected by NASA’s Juno spacecraft throughout a very shut flyby of Europa in 2022 — a distance of simply 219 miles (353 kilometers).
A U.S.-European workforce calculated that between 13 kilos and 39 kilos (6 kilograms and 18 kilograms) of oxygen are produced each second at Europa’s floor.
Earlier estimates had a a lot wider unfold, with as a lot as 2,245 kilos (1,100 kilograms) of oxygen produced per second. So “until Europa’s oxygen manufacturing was considerably larger prior to now,” the brand new measurements present “a narrower vary to assist habitability,” the researchers wrote.
This oxygen is fashioned, together with hydrogen, as Jupiter’s radiation blasts Europa’s world shell of frozen water.
Lead writer James Szalay of Princeton College stated Juno’s flyby was the primary time a spacecraft “straight sniffed” Europa’s environment. “We couldn’t wait to peek behind the scenes of its complicated surroundings,” he stated in an electronic mail.
Whereas it’s “a considerably narrower vary than we beforehand thought, there’s nonetheless so much we are able to be taught,” Szalay stated.
It’s unknown how a lot oxygen escapes into the moon’s environment, how a lot stays within the ice and the way a lot would possibly discover its method to the subterranean sea.
NASA plans to launch the Europa Clipper this fall. The spacecraft will make dozens of shut flybys of Europa — almost the scale of our moon — whereas orbiting the enormous gasoline planet.
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