[3840 x 2160] Light Echoes Used to Study Protoplanetary Disks
![[3840 x 2160] Light Echoes Used to Study Protoplanetary Disks](https://64.media.tumblr.com/d10d4e6b36df88a17ea02a17e8771356/tumblr_o8oo73Vgia1s64f72o1_1280.jpg "[3840 x 2160] Light Echoes Used to Study Protoplanetary Disks")
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