ScienceCast 255: Hubble’s Contentious Constant

published 3 years ago

This could change is constant. By science at NASA. Thanks to astronomer Edwin Hubble and others scientists have known since 1929 that our universe is expanding. Its current rate of expansion is called Hubble's constant or H. not. There are 2 leading ways to measure H. not. And for 15 years they more or less agreed with one another. Not anymore and that's a big deal. Here's why. In the standard model of cosmology H. not is a crucial ingredient right up there with the speed of light. It's not backers into everything we know about the universe how old it is how big it is what it's made of. If H. not as tweet we get a different age of the universe. Different relative amounts of matter dark matter dark energy and so ...

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