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Continue to ChatM57 — The Ring Nebula in HaRGB https://obsballona.net/wordpress/2013/07/21/m57-the-ring-nebula-in-hargb/
M57 — The Ring Nebula in HaRGB https://obsballona.net/wordpress/2013/07/21/m57-the-ring-nebula-in-hargb/