Oxygen accounts for about 21% of Earth's air, with the rest of our atmosphere primarily nitrogen. And most living things - including people, as we well know - need oxygen to survive.
Data from NASA's Magellan spacecraft and Pioneer Venus Orbiter is used in an undated composite image of the planet Venus. NASA/JPL-Caltech/Handout via REUTERS/File PhotoWASHINGTON, Nov 8 - offers quite a different story. Its thick and noxious atmosphere is dominated by carbon dioxide - 96.5% - with lesser amounts of nitrogen and trace gases. Oxygen is nearly absent.
"The Venus atmosphere is very dense. The composition is also very different from Earth," said German Aerospace Center physicist Heinz-Wilhelm Hübers, lead author of the study published in the journal"Venus is not hospitable, at least for organisms we know from Earth," Hübers added. "On Earth, our life-protecting stratospheric ozone layer represents a well-known example of such photochemistry," Wiesemeyer added.
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