ERIK MARTIN WILLÈN
Author of science fiction
Friday, December 26, 2014
WELL - KNOW GALAXIES PUT TO SCALE SIZE AND DISTANCE
Interesting
#infographic
via reddit.
For the sources and full discussion:
http://www.reddit.com/r/space/comments/2p86s3/size_and_distance_of_wellknow_galaxies_put_to/
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