NICK WRIGHT, IPHAS TEAM / SCIENCE PHOTO LIBRARY NICK WRIGHT, IPHAS TEAM / SCIENCE PHOTO LIBRARY
NGC 6781 planetary nebula, infrared image. A planetary nebula is a series of shells of gas cast off by a dying star. The ejection of the star's outer layers exposes its hot core, whose radiation ionises the shells, causing them to glow. NGC 6781 is found in the constellation Aquila. Image obtained using the Isaac Newton Telescope (INT) at Roque de los Muchachos Observatory in La Palma, Canary Islands, as part of the IPHAS (The INT Photometric H-alpha Survey of the Northern Galactic Plane) survey.
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