PBS Space Time

tv show

poster for PBS Space Time

409 total episodes

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12 seasons

First Aired February 11, 2015

Overview

Space Time explores the outer reaches of space, the craziness of astrophysics, the possibilities of sci-fi, and anything else you can think of beyond Planet Earth.

The NEW Crisis in Cosmology poster unavailable

The NEW Crisis in Cosmology

Season 2021 - Episode 8 - 0h 19m

Air Date

March 16, 2021

Overview

I have good news and bad news. Bad news first: two years ago we reported on the Crisis in Cosmology. Since then, it’s only gotten worse. And actually, the good news is also that the crisis in cosmology has actually gotten worse, which means we may be onto something! The most exciting thing for any scientist is when something they thought they knew turns out to be wrong. So it’s no wonder that many cosmologists are starting to get excited by what has become known as the Hubble tension, or the crisis in cosmology. The “crisis” is the fact that we have two extremely careful, increasingly precise measurements of how fast the universe is expanding which should agree with each other, and yet they don’t.