Crux the Southern Cross is the smallest of the sky's 88 constellations.
You can see something interesting just looking at Crux without optical aid.
Near its brightest star, Alpha Crucis, is a dark, 4°-wide swath of sky called the Coalsack.
Only one 5th-magnitude star intrudes here.
On the eastern edge of Crux, the Jewel Box Cluster (NGC 4755) also is visible to the naked eye.
This well-defined clump of colorful stars contains at least 25 members brighter than 12th magnitude and looks great in any size telescope.
Jose Carlos Diniz photographed the constellation from his observatory in Nova Friburgo, Rio de Janeiro, Brazil.
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