The sky near the Snoqualmie Summit in the Cascades gets dark enough on a moonless night to reveal a gentle airglow, seen as green here. [OC][7365x2947] via /r/spaceporn http://ift.tt/2bEZ3HE
via Tumblr http://ift.tt/2bAHEo8
The sky near the Snoqualmie Summit in the Cascades gets dark enough on a moonless night to reveal a gentle airglow, seen as green here. [OC][7365x2947] via /r/spaceporn http://ift.tt/2bEZ3HE
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