February 9, 2012
The oldest light in the universe still hums faintly through space, a relic of the beginning itself.
Trees, Stars, Aurora!
Birthday · February 9, 2012
A little universe, just for you
Your date.
Ready to give.
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APOD published February 9, 2012 · Video still. Credit: Christian M�lhauser; Music: Elemental by Pulse Faction; Path of Stars by Jonathan Geer. A publication-date match, not a photo taken on your date. Independent of NASA.
Have you ever seen an aurora? Auroras are occurring again with increasing frequency. With the Sun being unusually dormant over the past four years, the amount of Sun-induced auroras has been unusually low. More recently, however, our Sun has become increasingly active and exhibiting a greater abundance of sunspots, flares, and coronal mass ejections. Solar activity like this typically expels charged particles into the Solar System, some of which may trigger Earthly auroras. Two weeks ago, beyond trees and before stars, a solar storm precipitated the above timelapse displays of picturesque auroras above Ravnastua, Skoganvarre and Lakselv, Norway. Curtains of auroral light, typically green, flow, shimmer and dance as energetic particles fall toward the Earth and excite air molecules high up in the Earth's atmosphere. With solar maximum still in the future, there may be even better opportunities to see spectacular auroras personally over the next few years.
Image credit: Christian M�lhauser; Music: Elemental by Pulse Faction; Path of Stars by Jonathan Geer