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The study of the large-scale structure, history, and future of the universe. Cosmology is about asking and answering questions about the "big picture" - the extent, origin, and fate of everything we know.

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Why is the constant of integration zero when solving the Friedmann equations?

I'm confused regarding relating the Hubble constant H$_0$ to current age of the universe $t_0$. I'm looking at solutions for different epochs of the Friedmann equation, which I've got in the general f …
Eli Bartlett's user avatar