PBS Space Time
tv show

409 total episodes
-
12 seasons
First Aired February 11, 2015
Genres:
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.
What If Dark Energy is a New Quantum Field?
Season 2022 - Episode 22 - 0h 17m
Air Date
August 17, 2022
Overview
What is Quintessence? Well we know that something is up with the way the universe is expanding - there’s some kind of anti-gravitational effect that’s causing the expansion to accelerate. We don’t know what it is - just that it competes against the inward-pulling effect of gravity. And it’s winning - it looks like the universe will expand forever, at an ever-increasing rate. We call this mysterious influence dark energy, but while we’ve talked a lot about how it behaves, we’ve never really explored what it is. So, what is dark energy, really?