Open cluster NGC 6231, photographed through a Celestron C 9 1/4 Schmidt-Cassegrain. At the bottom of the image are seen ζ1 (right) and ζ2 (left) Scorpii. ζ1 is a hypergiant star and member of the cluster and one of the brightest stars in Milky Way, while ζ2 lies more than 10 times closer.
<a href="//commons.wikimedia.org/wiki/User:StudentAstronomyGroupUoC" title="User:StudentAstronomyGroupUoC">StudentAstronomyGroupUoC</a>
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