Rosetta spacecraft detects unexpected ultraviolet aurora at a comet

Data from Southwest Research Institute-led instruments aboard ESA’s Rosetta spacecraft have helped reveal auroral emissions in the far ultraviolet around a comet for the first time. At Earth, auroras are formed when charged particles from the Sun follow our planet’s magnetic field lines to the north and south poles. There, solar particles strike atoms and molecules in […]

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Aurora, Meet Airglow

“Aurora, Meet Airglow” Two of Earth’s most colorful upper atmospheric phenomena, aurora and airglow, met just before dawn in this photo shot by an astronaut on the International Space Station (ISS). Wavy green, red-topped wisps of aurora borealis appear to intersect the muted red-yellow band of airglow as the ISS passed just south of the Alaskan Peninsula. […]

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