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Star on a #Hubble diet. 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. Models, Stars Cluster, Sky, Galaxies, Hubble Spaces Telescope, Mists, Cosmo, Cloud, Astronomy
NGC 6357: Cathedral to Massive Stars Image Credit: NASA, ESA and Jesús Maíz Apellániz (IAA, Spain) Explanation: How massive can a normal star be? Estimates made from distance, brightness and standard solar models had given one star in the open cluster Pismis 24 over 200 times the mass of our Sun, nearly making it the record holder.
Ghost Nebula Image brought to you courtesy of www.robotradio.com | Cosmic Streams of Consciousness |
Star Cluster Pismis 24/Nebula NGC 6357: Pismis 24 hangs over NGC 6357, a nebula about 8000 ly away in the constellation Scorpius. This picture showed that the brightest star in the cluster is in fact two stars in a tight binary orbit. Each star is about 100 times the Sun's mass. Hubble
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