Scientists have detected atomic oxygen in the Martian atmosphere for the first time since the last observation 40 years ago. Atomic oxygen - an elemental form of oxygen that does not exist in Earth's atmosphere - affects how other gases escape Mars and therefore has a significant impact on the planet's atmosphere. An instrument onboard the Stratospheric Observatory for Infrared Astronomy (SOFIA) - a joint project of Nasa and the German Aerospace Center - helped detect these atoms in the upper layers of the Martian atmosphere known as the mesosphere, Nasa said in a statement. "Atomic oxygen in the Martian atmosphere is notoriously difficult to measure," said SOFIA project scientist Pamela Marcum. "To observe the far-infrared wavelengths needed to detect atomic oxygen, researchers must be above the majority of Earth's atmosphere and use highly sensitive instruments, in this case a spectrometer. SOFIA provides both capabilities," Marcum noted. The s...
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