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 The Amazing Expanding, Accelerating Universe

Audio Lectures by: Neta A. Bahcall and Wendy Freedman  

In this 1999 conversation from the Science Friday archives, astrophysicists Neta Bahcall and Wendy Freedman explain the then-revelation that the universe’s expansion is accelerating, not decelerating.

Planet Earth compared to other planets and stars in size.

Ever woundered how big the largest known star is

This video gives some idea of just how large they are.

 

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