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Physics 8 Online
OpenStudy (anonymous):

The escape velocity of the universe is 1Ly/s. Is it correct?

OpenStudy (irishboy123):

https://www.youtube.com/watch?v=mnENgtCdObo seriously doubt it

OpenStudy (irishboy123):

from Sagan https://www.youtube.com/watch?v=3WL_vtu4r1w

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