... Supernova 1994D and the Unexpected Universe . ... The Vernal Equinox occurs March 20, marking the first day of Spring for the Northern Hemisphere. ... On February 10th, an evocative evening sky above Rocklin, California, USA inspired astrophotographer Steve Sumner to record this remarkable sight - five planets and the Moon. ... Abell 2142: Clash of the Galaxy Clusters . ... The dark clouds, suggestively shaped like smoke rising from a pipe, are caused by absorption of background starlight by dust. ...