Spiral arms in protoplanetary disk: They're not just for galaxies any more https://t.co/LouZFddt5O https://t.co/VzXpJG2CKR
— iPhoneMaster13 (@iPhoneMaster13) September 30, 2016
from Twitter https://twitter.com/iPhoneMaster13
September 30, 2016 at 10:19AM
via IFTTT
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