public marks

PUBLIC MARKS from recent with tag electric

May 2008

April 2008

April 2007

March 2007

Aurora (astronomy) - Wikipedia, the free encyclopedia

The aurora is a common occurrence in the ring-shaped zone. It is occasionally seen in temperate latitudes, when a strong magnetic storm temporarily expands the auroral oval. Large magnetic storms are most common during the peak of the eleven-year sunspot

February 2007