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Sunday, June 12, 2016

[3840 x 2160] Light Echoes Used to Study Protoplanetary Disks...



[3840 x 2160] Light Echoes Used to Study Protoplanetary Disks via /r/spaceporn http://ift.tt/28vyk9r



via Tumblr http://ift.tt/24Kgn2l

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