Thursday, February 28, 2013
It seems NASA has discovered a new, temporary radiation belt surrounding Earth. To me, however, the really amazing part of the discovery was what they think may have caused it - a spectacular eruption of solar plasma on August 31st, 2012. Here's a reduced-size photograph of it.
It's astonishing to realize that pillar of plasma is millions of miles long! A full-size version of the photograph may be seen here. It makes a spectacular wallpaper background for your computer screen.