Image Credit & Copyright: Dieter Willasch (Astro-Cabinet)
Explanation: 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). M7 contains about 100 stars in total, is about
200 million years old, spans 25
light-years across, and lies about 1000 light-years away. The
above deep exposure was taken from
Hakos Farm in
Namibia. The
M7 star cluster has been known since ancient times, being noted by
Ptolemy in the year
130 AD. Also visible are a
dark dust cloud and literally millions of unrelated stars
towards the Galactic center.
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