okt 252013
 
Anne's Image of the Day: The Butterfly Cluster

October 25, 2013 The Butterfly Cluster, an open cluster in Scorpius Image Credit: N.A.Sharp, Mark Hanna, REU program/NOAO/AURA/NSF The Butterfly Cluster (also known as Messier 6 or NGC 6405) is a bright open star cluster of some 12 light-years across, located around 1,600 light-years away from Earth in the southern constellation of Scorpius (the Scorpion). [continue reading]