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Royalty-free astronomy stock photo of the Ring Nebula (Messier 57, NGC 6720), a planetary nebula, in the constellation of Lyra. The blue isolates emission from very hot helium, which is located primarily close to the hot central star. The green represents ionized oxygen, which is located farther from the star. The red shows ionized nitrogen, which is radiated from the coolest gas, located farthest from the star. The gradations of color illustrate how the gas glows because it is bathed in ultraviolet radiation from the remnant central star (hot white dwarf), whose surface temperature is a white-hot 120,000 degrees Celsius. Photo Credit: Hubble Heritage Team (STScI / AURA), NASA [0003-0710-2121-4838] by 0003
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Keywords
astronomy, in space, lyra, messier 57, nasa, nebula, nebulae, outer space, planetary nebula, ring nebula, space
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