Each labeled dot in this photo I took of markarian’s chain is a galaxy, each contains about a hundred million stars more than half of which have planets and about one percent of those planets are habitable. About 200 galaxies means over 100000000 habitable worlds. We are not alone. via /r/spaceporn https://ift.tt/3oO9WgN
from Tumblr https://ift.tt/32auMgJ
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