Sunday, July 7, 2013

Astronomy Cast Ep. 269: Mass

Last week we talked about energy, and this week we'll talk about mass. And here's the crazy thing. Mass, matter, the stuff that the Universe is made of, is the same thing as energy. They're connect through Einstein's famous formula - E=mc2. But what is mass, how do we measure it, and how does it become energy, and vice versa.

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