Corona Australis is a constellation in the southern hemisphere. Its name is Latin for "southern crown." It was first charted by the Greek astronomer Ptolemy in the 2nd century. On Greek star maps, it was depicted as a wreath rather than a crown. Before Ptolemy, they referred to it as a circlet of stars located under Sagittarius'
forefeet and not as a separate constellation. The only legend associated with the name is that of the crown Dionysus placed in the sky after freeing his mother Semele from Hades. The same myth is sometimes associated with the constellation Corona Borealis
(the Northern Crown).
Corona Australis occupies an area of 128 square degrees and does not contain any stars with known planets. It can be seen at latitudes between +40° and -90° and is best visible at 9 p.m. during the month of August.
The constellation does not have any stars brighter than fourth magnitude. The brightest star is 
beta Coronae Australis, an orange giant with a magnitude of 4.11. 
alpha Coronae Australis or Alphekka ("break" or "middle") Meridiana is the only named star in the constellation.
Another interesting star is RX J1856.5-3754, an isolated neutron star first caught by NASA's Hubble Space Telescope in 1997. It is a bright, hot, gravitationally collapsed and burned out star believed to have been created after its companion star exploded in a supernova about a million years ago.
Other notable stars are 
gamma Coronae Australis, a binary consisting of a close pair of F8 main sequence stars, kappa Coronae Australis, an 
A0 giant with a 
B9 main sequence star for a companion, and 
lambda Coronae Australis, a white main sequence star with a magnitude 9 companion.
Corona Australis also contains an interesting global cluster and a region of nebulosity. NGC 6541 is a bright, large globular cluster approximately 15,000 light-years away from Earth. It can be seen halfway between 
theta Coronae Australis and 
NGC 6729 is a combination reflection and emission nebula surrounding R Coronae Australis, an Orion variable. The nebula is part of a region that contains both dark and bright nebulae.
Corona Australis belongs to the Hercules family of constellations, along with Hercules
, Triangulum Australe
Constellations directly bordering Corona Australis are Sagittarius