15 Dec 2010

At we have a video clip and a story on a sunspot eruption way back in August (see also december 14th). What prompted the post was a paper just published in the Journal of Geophysical Research on the electro-magnetic significance of the eruption.

At we learn that NASAs Voyager I spacecraft has reached a spot on the edge of the solar system where solar wind is absent, or minimal. It is not expected to pass fully through the heliosphere for another 4 years.