The Corona Australis Molecular Cloud is a dark nebula of gas and dust located about 430 light-years, or 130 parsecs, from Earth. It is one of the closest active star-forming regions to our solar system, sitting in the constellation Corona Australis near the border with Sagittarius and spanning roughly 8 light-years across. Its total mass amounts to approximately 7,000 times that of the Sun.
How far is the Corona Australis Molecular Cloud from Earth?
The Corona Australis Molecular Cloud lies about 430 light-years, or 130 parsecs, from Earth. That distance places it among the nearest star-forming regions to our solar system.
What types of young stars are forming in the Corona Australis Molecular Cloud?
Astronomers have detected 425 infrared sources near the L1688 sub-cloud, most classified as young stellar objects. These include 16 protostars, 123 T Tauri stars with dense circumstellar disks, and 77 T Tauri stars with thinner disks. Their estimated ages range from 100,000 to a million years.
What is the Coronet protostar cluster in the Corona Australis Molecular Cloud?
The Coronet is a loose collection of about 30 young stars at the heart of the cloud's most active star-forming zone, spanning a wide range of masses and development stages. Surrounding it are late-stage B stars, numerous Herbig-Haro objects, and young stellar objects, along with two confirmed brown dwarfs and seven more brown dwarf candidates.
What nebulae are found in the Corona Australis Molecular Cloud?
The most notable nebulae within the cloud are NGC 6726, NGC 6727, NGC 6729, and IC 4812, all reflection nebulae that glow by scattering light from nearby young stars. NGC 6726 and NGC 6727 are part of the cloud system, while NGC 6729 shares the same patch of sky but is not physically associated with it. Three of the four were first recorded by Johann Friedrich Julius Schmidt in 1865.
Is NGC 6723 part of the Corona Australis Molecular Cloud?
NGC 6723 is not part of the Corona Australis Molecular Cloud. Despite appearing in the same region of the sky, it lies 29,000 light-years away, far beyond the cloud. It shares only a line of sight with the cloud and has no physical connection to its star-forming activity.