Radiation from these massive stars catches electrons from the hydrogen atoms of nebula.When the energized electrons go from higher-energy state to their lower-energy state by combining with hydrogen nuclei, they emit energy in the form of light, which in turn causes the nebula’s gas to glow. In the recent Hubble image, presence of ionized iron emission was indicated in red.
Prawn Nebula is also called as IC 4628. It is an emission nebula located in Sagittarius Arm of the Milky Way. Its distance is around 6,000 light-years from Earth in Scorpius constellation. Nebula forms part of the tail of “False Comet” anchored by bright open cluster NGC 6231. This Nebula is also called as Gum 56, honouring Australian astronomer Colin Gum. Gum had published a catalogue of HII regions in 1955.
