PBS Space Time

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Uploaded 22-11-17

Let’s take a moment to remember the selfless sacrifices made by some amazing robotic explorers. And be sure to learn more about your personal DNA story by going to https://www.23andMe.com/spacetime and taking advantage of their special holiday offer.

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Previous Episode:
Zero-Point Energy Demystified | Space Time
https://www.youtube.com/watch?v=Rh898Yr5YZ8

It takes a lot of tech to send humans into space and to keep people alive up there, and get them safely home. But we have few qualms about sending robots on one-way suicide missions to the stars. And in some cases, the very destruction of these probes is part of the scientific experiment. Or in the case of the recent destruction of Cassini, to protect the solar system for future experiments. Today we’re going to memorialize the robots that have given their lives for in the name of space exploration.

Hosted by Matt O'Dowd
Written by Drew Rosen and Matt O'Dowd
Produced by Rusty Ward
Graphics by Kurt Ross
Assistant Editing and Sound Design by Mike Petrow
Made by Kornhaber Brown (www.kornhaberbrown.com)

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Uploaded 08-12-16

What really happens when you approach the event horizon of a black hole? What do you see when you actually cross it? Matt shows you an elegant tool for understanding this mysterious region of spacetime. This episode is supported by The Great Courses Plus. Go to http://ow.ly/WPIo306GotR for your one month free trial!

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CUNY Physics (stay tuned for event April 7 event details):
http://www.gc.cuny.edu/Page-Elements/Academics-Research-Centers-Initiatives/Doctoral-Programs/Physics

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Written and hosted by Matt O’Dowd
Produced by Rusty Ward
Graphics by Grayson Blackmon
Made by Kornhaber Brown (www.kornhaberbrown.com)


Comments Answered by Matt:


dinosaurfromfuture
https://www.youtube.com/watch?v=RlXdsyctD50&lc=z12cw3dapnftev0z104ce5pyzqaejbrwpg0


vacuum diagram
https://www.youtube.com/watch?v=RlXdsyctD50&lc=z13gwn3p1tndfdyuj23md5ipdy2xvb33y


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Uploaded 03-04-19

Have you ever asked “what is beyond the edge of the universe?” And have you ever been told that an infinite universe that has no edge? You were told wrong. In a sense. We can define a boundary to an infinite universe, at least mathematically. And it turns out that boundary may be as real or even more real than the universe it contains.

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#infinitity #edgeoftheuniverse #spacetime

Learn More About Dark Energy Here:
https://www.youtube.com/playlist?list...

Hosted by Matt O'Dowd
Written by Matt O'Dowd
Graphics by Aaron Halevy
Directing by Andrew Kornhaber

Our universe may be infinite. In order to wrap our puny human minds around such a notion we like to come up with boundaries. For example we have the “observable universe” – that patch that we can see, and beyond which light has not yet had time to reach us. It’s boundary is called the particle horizon. Beyond it there exists at a minimum of thousands and possibly infinitely more regions just as large. Our observable universe is like a tiny patch of land in a vast plain. We define its horizon like we might build a little picket fence around our little patch – meaningless from the point of view of the plain, but it makes our patch feel more homey and us less crushingly insignificant.

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Uploaded 30-08-17

Black holes are very well known but... What is a White Hole?
Get 15% off your next purchase at https://www.legalzoom.com/spacetime. LegalZoom is not a law firm or a substitute for the advice of an attorney.

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Previous Episode:
https://youtu.be/OfOuBx6XW3Q

Black Hole Playlist
https://www.youtube.com/watch?v=vNaEBbFbvcY&list=PLsPUh22kYmNBl4h0i4mI5zDflExXJMo_x

How Time Becomes Space Inside a Black Hole
https://www.youtube.com/watch?v=KePNhUJ2reI

Are You a Boltzmann Brain?
https://www.youtube.com/watch?v=nhy4Z_32kQo

Lurking in the depths of the mathematics of Einstein’s general relativity is an object even stranger than the mysterious black hole. In fact it’s the black hole’s mirror twin, the white hole. Some even think that these could be the origin of our universe.

Written by Drew Rosen and Matt O’Dowd
Hosted by Matt O’Dowd
Produced by Rusty Ward
Graphics by Kurt Ross
Assistant Editing and Sound Design by Mike Petrow
Made by Kornhaber Brown (www.kornhaberbrown.com)

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Uploaded 17-06-19

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Black holes are really only dangerous if you get too close. Ha, who am I kidding. It turns out they may be responsible for ending star formation across the entire universe.

Hosted by Matt O'Dowd
Written by Matt O'Dowd
Graphics by Leonardo Scholzer
Directed by Andrew Kornhaber
Produced By: Kornhaber Brown

When we first realized that black holes could have masses of millions or even billions of times that of the sun, it came as a bit of a shock. They were discovered as the driving force behind quasars, where matter is heated to extreme incandescence before its plunge into vast black holes. But if that weren’t enough, we soon realized that every single decent-sized galaxy contains such a supermassive black hole. By the beginning of the 21st century it became clear that black holes and the galaxies that contain them are very closely connected. The bigger the galaxy, the bigger its supermassive black hole. That might not sound surprising. What was weird was how closely they were connected. There’s a tight correlation between the mass the central black hole and the mass of the stars in the galactic bulge – that’s the central ball-like part of a spiral galaxy, or the entirety of an elliptical galaxy, and every bulge contains a supermassive black hole around one-one-thousandth its mass. And there’s an even tighter relationship between the black hole mass and the speed that stars are moving in their random orbits within the galactic bulge – the so-called stellar velocity dispersion – which itself depends of the total mass of the galaxy, including dark matter.

Big Bang Supporters:

Anton Lifshits
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Uploaded 04-05-20

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The universe is precisely 13.8 billion year old - or so our best scientific methods tell us. But how do you learn the age of the universe when there’s no trace left of its beginnings?

Hosted by Matt O'Dowd
Written by Dan Falk and Matt O'Dowd
Graphics by Leonardo Scholzer, Yago Ballarini, and Pedro Osinski
Directed by: Andrew Kornhaber
Camera Operator: Bahaar Gholipour
Executive Producers: Eric Brown and Andrew Kornhaber

End Credits Music by J.R.S. Schattenberg: https://www.youtube.com/channel/UCRl6-nb4iOnsij-vnpAjp0Q

#space #astrophysics #cosmology

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