CG31 (middle) and CG30 (upper right) are cometary globules that harbor active star forming hydrogen molecular clouds in the densely star populated region of the constellation Puppis. Cometary globules get their name from their fan shapes that somewhat resemble comets. Pre- main sequence stars that are still gravitationally contracting, protostars, and hydrogen burning main sequence stars are present in this 18x28 arc minute field of view. HH120, a Herbig-Haro object associated with newly born stars, is the small patch of nebulosity in the head of CG30.
The colored image above is a combination of Ha, green, and blue channels. The lower image is in Ha only.
08h 09' 29
Date Imaged :
March 23, 2011
Astrodon HaGB 480:117:126 minutes
Stardust Observatory, Baguio