Royalty free doubly ionized oxygen photos
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Messier 57, Ring Nebula, Hubble Space Telescope, planetary nebula, Lyra, central white dwarf, doubly ionized oxygen, hydrogen emission, bipolar nebula, Spitzer Space Telescope, fine details
Public Domain
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Messier 57, Ring Nebula, planetary nebula, Lyra constellation, white dwarf, doubly ionized oxygen, hydrogen emission, bipolar nebula, RA Dec Astronomy, APOD, HST LS Giuseppe Donatiello
Public Domain
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NGC 6822, Barnard's Galaxy, galactic cirrus clouds, irregular galaxy, Local Group, planetary nebula, NGC 6818, doubly ionized oxygen, central bulge region, Edward Emerson Barnard, turquoise color
Public Domain
