PBS Space Time Season 2024

January. 10,2024      
Rating:
10
Trailer Synopsis

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 with our astrophysicist host: Matthew O’Dowd.

Episode 13 : Can Black Holes Unify General Relativity & Quantum Mechanics?
May. 24,2024
Episode 12 : Interstellar Expansion WITHOUT Faster Than Light Travel
May. 16,2024
Episode 11 : What Happens If You Jump Into A Black Hole?
May. 01,2024
Meet Alice and Bob, famous explorers of the abstract landscape of theoretical physics. Heroes of the gerdankenexperiment—the thought experiment—whose life mission is to find contradictions in the deepest layers of our theories. Today our intrepid pair are jumping into a black hole. Again. Why? Well, to determine the fundamental structure of spacetime and its connection to quantum entanglement of course.
Episode 10 : Why Is The World Rushing Back To The Moon?
April. 18,2024
The Moon has been one of the most important theoretical stepping stones to our understanding of the universe. We’ve long understood that it could also be our literal stepping stone: humanity’s first destination beyond our atmosphere.
Episode 9 : How Eclipses Revealed Our Solar System
April. 06,2024
Of all the astronomical phenomena you can witness, the total solar eclipse has to be the most visceral--the most in-your-face reminder that our reality consists of giant balls of rock spinning around stars. It's also the eclipse and phenomena like it that set us on the path to understanding that reality in the first place.
Episode 8 : What If Gravity is NOT A Fundamental Force? | Entropic Gravity
March. 28,2024
There are four fundamental forces - the strong and weak nuclear forces, electromagnetism, and gravity. Except maybe gravity is no more fundamental than the force of a stretched elastic band. Maybe gravity is just an entropic byproduct—an emergent effect of the universe’s tendency to disorder. If you allow entropy to keep you in your seat for a bit, I’ll tell you all about it.
Episode 7 : Does Space Emerge From A Holographic Boundary?
March. 21,2024
Space seems fundamental. To build a universe, surely you need something to build it on or in. Many, maybe most physicists now think that the fabric of space emerges from something deeper. And perhaps the most existentially disturbing such proposal is that our 3-D universe is just the inward projection of an infinitely distant boundary. A hologram, or sorts. Let’s see how that can actually work, and what the holographic principle really says about the “realness” of this universe.
Episode 6 : Dark Forest: Should We NOT Contact Aliens?
March. 14,2024
In 1974 we sent the Arecibo radio message towards Messier 13, a globular cluster near the edge of the Milky Way, made up of a few hundred thousand stars. The message was mostly symbolic; we weren’t really expecting a reply. Yet surely other civilisations out there are doing the same thing. So, why haven’t we heard anything? What if the silence from the stars is a hint that we shouldn’t be so outgoing? What if aliens are deliberately keeping quiet for fear that they might be destroyed?
Episode 5 : EMP Attack: The Real Science of Electromagnetic Pulse
February. 29,2024
EMPs aren’t science fiction. Real militaries are experimenting on real EMP generators, and as Starfish Prime showed us, space nukes can send powerful EMPs to the surface. So what exactly is an EMP, and how dangerous are they?
Episode 4 : What if Singularities DO NOT Exist?
February. 22,2024
It's not too often that a giant of physics threatens to overturn an idea held to be self-evident by generations of physicists. Well, that may be the fate of the famous Penrose Singularity Theorem if we're to believe a recent paper by Roy Kerr. Long story short, the terrible singularity at the heart of the black hole may be no more.
Episode 3 : Did JWST Solve The Mystery of Supermassive Black Hole Origins?
February. 14,2024
This is what we astronomers call a blob, or a smudge, if you want to get really technical. It may not look like much from here, but what do you expect for something near the literal edge of the observable universe. If you were there when this light was emitted, you’d A. be at the beginning of time, and B. be looking at an entire galaxy containing an enormous black hole at its heart. It’s the most distant black hole we’ve semi-directly detected. That’s cool enough on its own, but as an added bonus this one smudge may have solved the mystery of the origin of the supermassive black holes in our universe.
Episode 2 : Does Antimatter Create Anti-Gravity?
January. 17,2024
From hoverboards to flying cars to cloud cities, anti-gravity is a staple of science fiction and our dream of a less Earth-bound future. But in the real universe gravity appears to be a purely attractive force. Feels like its main MO is keeping us stuck to the surface of this lonely rock. But maybe if we science hard enough we can remove the fiction from science fiction. For the sake of our flying cars we should at least try. And for many years, physicists have wondered whether a certain well-known exotic material may experience gravitational repulsion from the Earth. That material is antimatter, and physicists at CERN have just completed a very long and very difficult experiment to answer a seemingly simple question: does antimatter fall down, or does it fall up?
Episode 1 : Can Cosmic Voids Solve The Crisis in Cosmology?
January. 10,2024
Two of the greatest mysteries in cosmology are the nature of dark energy and the apparent conflict in our measurements of the expansion rate of the early versus the modern universe that even dark energy can’t account for. Could both of these be explained by looking to a part of the universe that we’ve largely ignored so far? Could cosmic voids be driving the universe?

Seasons

Season 2024
Season 2024 2024
Season 2023
Season 2023 2023
Season 2022
Season 2022 2022
Season 2021
Season 2021 2021
Season 2020
Season 2020 2020
Season 2019
Season 2019 2019
Season 2018
Season 2018 2018
Season 2017
Season 2017 2017
Season 2016
Season 2016 2016
Season 2015
Season 2015 2015
Season 1
Season 1 2015

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