Caption: You may be able to spot the Butterfly Cluster
with your naked eye if you're under dark enough skies, but this cluster really sparkles with binoculars or a small scope.
splashy open cluster Messier 6, the Butterfly Cluster
. In a dark
The other is M6, which only needs low telescopic power to show why it is sometimes called the Butterfly Cluster
Upper right of M7 is M6, the Butterfly Cluster
. At bottom center is tiny, bright NGC 6231 above the close star pair Zeta' and Zeta', which smolder orange and white.
M6, known as the Butterfly Cluster
, contains many blue stars plus a prominent orange star in its eastern "wing." M7 is somewhat larger and is beautifully set against a bright starcloud of the Milky Way.
It says, "Somewhat irregular in shape, with a central rib of stars and resembles a butterfly with open wings." The group is now commonly known as the Butterfly Cluster
. Oddly, not everyone outlines the butterfly in the same way.