Crux, the southern cross:
Crux is a modern constellation. During ancient times the stars
that made up this constellation were part of Centaurus. The first
mention of the constellation was in 1592 by Emerie Mollineux. The
French astronomer Augustin Royer is credited with defining it as
a separate constellation in 1679. Crux is the smallest constellation
in the night sky, and is not visible from latitudes north of 25
degrees (Key West, Florida).