The Sun’s Halo in 3-D

New perspectives on solar explosions

For 4 minutes and 7 seconds early on the afternoon of March 29, thousands of people who had trekked deep into the southern Sahara Desert saw blazing day turn into night. Wearing turbans to keep the sand out of their hair, the sky watchers in Libya were treated to a picture-perfect view of the sun being blocked by the shadow of the moon.