This is a site about all things cosmos, Astronomy, Space, Science, Theoretical Science, History, Life. In between you will see a lot of appreciation towards popularizers of science and the cosmos like the late Carl Sagan. I will post music to go along with the vibe of this site, as well as images relating to space and science, Videos, artist impressions. etc. Browse through, there might just be something that will strike a chord.
Wednesday, October 6, 2010
Aurora Over Alaska
Are those green clouds or aurora? Photographed above two weeks ago, puffy green aurora help the Moon illuminate the serene Willow Lake and the snowy Wrangell and Saint Elias Mountains in eastern Alaska, USA. Although auroras might first appear to be moonlit clouds, they only add light to the sky and do not block background stars from view. Called northern lights in the northern hemisphere, auroras are caused by collisions between charged particles from the magnetosphere and air molecules high in the Earth’s atmosphere. If viewed from space, auroras can be seen to glow in X-ray and ultraviolet light as well. Predictable auroras likely occur a few days after a powerful magnetic event has been seen on the Sun.