... M7: Open Star Cluster in Scorpius . ... M7 is one of the most prominent open clusters of stars on the sky. The cluster, dominated by bright blue stars, can be seen with the naked eye in a dark sky in the tail of the constellation of the Scorpion (Scorpius). ... Ring Nebula Deep Field . ... A familiar sight to sky enthusiasts with even a small telescope, the Ring Nebula (M57) is some 2,000 light-years away in the musical constellation Lyra. ... Halloween s Moon . ... Ares 1 X Rocket Lifts Off . ...