Corona Australis (ShaRA#10) – Spectrum of ScienceSkip to content
Readers’ Images Astronomy: Corona Australis (ShaRA#10)
© Team ShaRA
The subject captured with ShaRA#10 is a beautiful region of the southern sky in the constellation Corona Australis. Within this constellation there is a very interesting molecular cloud, as it is one of the star-forming regions closest to our Solar System (about 400/500 light-years away, a third of the distance that separates us from the Orion Nebula complex). In the field we captured there is an impressive array of objects: dark nebulae, Herbig-Haro objects, young star clusters, reflection nebulae, a beautiful globular cluster and some background galaxies. NGC 6729 is a blue reflection nebula located about 424 light-years from Earth. This nebula is part of a larger complex that also includes the emission nebula NGC 6726-27 and the open star cluster IC 4812. Its main feature is the presence of a young variable star, R Coronae Australis, which illuminates the nebula with its light. The interaction between the starlight and the surrounding material creates striking contrasts of light and shadow, making NGC 6729 a popular subject among astrophotographers. The Coronet Cluster, also known as CrA, is a young star cluster located about 554 light-years from Earth, in the same region where NGC 6729 is located. This cluster is one of the closest to Earth and serves as a natural laboratory for studying star formation. Estimated to be a few million years old, the Coronet Cluster is still surrounded by a molecular cloud of gas and dust, the primordial material from which stars form.
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