Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas
AMA | October 2024
Sean Carroll
So you put this all together and Einstein's equation gives you, or reduces to, what we call the Friedmann equation. named after Alexander Friedman, an early cosmologist, and it relates the change of the scale factor over time, which is given by the Hubble constant, a dot over a, if a is the scale factor and dot is a time derivative, the Hubble expansion parameter.
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