Oxygen swells in Cygnus

Team FACT: Louis Leroux-Géré/Cédric de Decker/Vincent Martin/Thibault Rouillée, taken from Starfront Observatories The Milky Way constellation of Cygnus is filled with seas of hydrogen gas, but 20 hours of exposure with an OIII filter uncovered rarely seen filaments of oxygen, glowing blue in this image. This vista spans more than 6°, encompassing emission nebulae Sharpless Continue reading "Oxygen swells in Cygnus" The post Oxygen swells in Cygnus appeared first on Astronomy Magazine .

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