Astronauts had this view of the aurora on September 26, 2011. Credit: NASA
We’ve had some great views of the aurora submitted by readers this week, but this one taken from the International Space Station especially highlights the red color seen by many Earth-bound skywatchers, too. Karen Fox from the Goddard Space Flight Center says the colors of the aurora depend on which atoms are being excited by the solar storm. In most cases, the light comes when a charged particle sweeps in from the solar wind and collides with an oxygen atom in Earth’s atmosphere. This produces a green photon, so most aurora appear green. However, lower-energy oxygen collisions as well as collisions with nitrogen atoms can produce red photons — so sometimes aurora also show a red band as seen here.
5 Replies to “Red Alert! Space Station Aurora”
Been a while since I last saw aurora here in middle northern California +/-10 years? But with Mr. Sol ramping up, whose nose?
P.S. Why isn’t the ‘comment counter’ working at UT?
I’m not really sure why it’s not working.
I hope it’s fixed soon. It’s hard to figure out where to devote TLC now.
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