spacettf: M1 - The Crab nebula in narrowband #Explored by swag72 (www.swagastro.weebly.com) on Flickr.

spacettf: M1 - The Crab nebula in narrowband #Explored by swag72 (www.swagastro.weebly.com) on Flickr.

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from: https://jtl4.tumblr.com/post/109295602971