SUNSET CONJUNCTION: When the sun goes down on Sunday, April 26th, step outside and look west. An exquisitely-slender crescent Moon is lining up with Mercury and the Pleiades star cluster for a three-way conjunction in the sunset sky. Click here for the full story and a sky map: http://spaceweather.com/
UNEXPECTED SOLAR ACTIVITY: The sun produced an unexpected burst of activity on April 23rd when an enormous prominence rose over the northeastern limb and erupted. A coronal mass ejection (CME) billowed away from the blast site, but the billion-ton cloud is not heading toward Earth. Visit http://spaceweather.com for movies of the event.