Science Junkie
A long way to go: The yellow dot shows the 200 light year radius of how far radio waves have reached into the Milky Way.
(via Earth calling: Tiny yellow dot shows distance radio broadcasts to aliens have travelled)

A long way to go: The yellow dot shows the 200 light year radius of how far radio waves have reached into the Milky Way.

(via Earth calling: Tiny yellow dot shows distance radio broadcasts to aliens have travelled)







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    A long way to go: The yellow dot shows the 200 light year radius of how far radio waves have reached into the Milky Way....
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