Radiation Satellites

This artist rendering provided by NASA shows the Van Allen radiation belts around Earth. A new study published Thursday Feb. 28, 2013, in the journal Science reports that NASA’s recently launched twin satellites to the region discovered a third, temporary ring. It appeared for a month before a shock wave from the sun destroyed it. Scientists are still trying to figure out how often this happens. (AP Photo/NASA)

February 28, 2013 7:00 pm  • 
Activate

Latest Hansen video

More videos

Greg Hansen: Ready for the Hall

Greg and Ryan talk about the Pima County Sports Hall of Fame, and which inductees are most deserving of the…


Follow the Arizona Daily Star

Featured businesses

View more...
View more...

Deals, offers & events

View more...

Event Calendar

Today's events | Add an event

Most viewed: