M6 is a galactic, or open cluster of stars
found in the constellation of Scorpius. It has a diameter of
about 20 light-years and lies about 2,000 light-years from
Earth. This cluster is composed mainly of blue and white stars
with the brightest being a yellow or orange giant. The shape of
this cluster somewhat resembles that of a butterfly, giving rise
to its more common name, the butterfly cluster. At magnitude 4.2
it is an easy find with binoculars.