The cloud is a 2 million light-year-wide hydrogen stream leading from Stephan's Quintet
from Livescience https://ift.tt/lGI2b8R
from Livescience https://ift.tt/lGI2b8R
For the precocious hunter of off-Earth life, the Drake equation is the ever-ready, go-to toolkit for estimating just how (not) lonely humans are in the Milky Way galaxy. But it's not useful. from Live Science http://bit.ly/2T8L56y
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