# EmissionNebula NGC6357

- By: NASA, ESA and Jesœs Maz Apellÿniz (Instituto de astrofísica de Andalucia, Spain). Acknowledgement: Davide De Martin…
- Date: 2006-12-19
- Classification: Photograph
- Credit line: https://www.spacetelescope.org/images/heic0619a/ (TIFF image 36 MB)
- Museum: [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:EmissionNebula_NGC6357.jpg)
- Rights: Public domain
- Picture: https://invisiblenetwork.ai/thumbs/commons/thumb/1/18/EmissionNebula_NGC6357.jpg/1920px-EmissionNebula_NGC6357.jpg
- Who can see it: Teens profiles and older (museums give no ratings; placed by Invisible Network from the museum's own words)

The star cluster Pismis 24 lies in the core of the large emission nebula NGC 6357 that extends one degree on the sky in the direction of the Scorpius constellation. Part of the nebula is ionised by the youngest (bluest) heavy stars in Pismis 24. The intense ultraviolet radiation from the blazing stars heats the gas surrounding the cluster and creates a bubble in NGC 6357. The presence of these surrounding gas clouds makes probing into the region even harder.