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Atom & Cosmos

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2017 total solar eclipse

TOTALLY AMAZING  Keon Gibson, an intern for the National Center for Atmospheric Research, shot the moment of totality through a telescope atop Casper Mountain, Wyo., on August 21. The corona stretches around the moon-blocked sun. The planet Mercury is visible in the bottom left.

FROZEN POLES  New simulations suggest that nighttime cooling of clouds of water-ice can create rapid plumes of snow that might deposit some of the snow seen at Mars’ poles.

multi-wavelength mosaic of the sun

THE KITCHEN SINK  There are a lot of ways to study the sun, as shown in this multi-wavelength mosaic from NASA’s Solar Dynamics Observatory. During the eclipse, physicists will take every possible route to figuring out why the corona is so hot.

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