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Blinking Planetary Nebula

Credit: Calvin College Observatory, Deb Anderlohr
article: Observing the Constellation Cygnus 		Other images from this article
North American Nebula Hole-in-a-Cluster Eastern Veil Supernova Remnant Blinking Planetary Nebula Cygnus
Blinking Planetary Nebula, Calvin College Observatory, Deb Anderlohr