PBS Space Time

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Uploaded 19-04-17

In 1991 a single atomic nucleus slammed into our atmosphere with the intensity of a macroscopic object. It’s been named The Oh-My-God particle. Get your first two months of CuriosityStream free by going to http://curiositystream.com/spacetime and using the promo code “spacetime”.

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Referenced Videos:
Cosmic Microwave Background Radiation
https://www.youtube.com/watch?v=3tCMd1ytvWg

Previous Episode:
Telescopes on the Moon
https://www.youtube.com/watch?v=aHjiXTlFSSM

Cosmic rays aren’t actually rays at all, but atomic nuclei traveling at close to the speed of light. Typically they are low in energy and are easily deflected by other particles, but on rare occasions an incredibly powerful atomic nuclei strikes the Earth’s surface. The largest of these was the Oh My God Particle.

Written and Hosted by Matt O’Dowd
Produced by Rusty Ward
Graphics by Kurt Ross
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Comments answered by Matt:

https://www.youtube.com/watch?v=aHjiXTlFSSM&lc=z13vt3nb3ybdg3ok223kwrmq3nvyv3eyk04

https://www.youtube.com/watch?v=aHjiXTlFSSM&lc=z120zr0rfyi4c335i04cd3sr2wahunehijc

https://www.youtube.com/watch?v=aHjiXTlFSSM&lc=z13as1sgjrn1vjb1122yubbjpujodtbua

https://www.youtube.com/watch?v=aHjiXTlFSSM&lc=z12lhfop2y3hitytz23ien34snzztvng104

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Uploaded 26-04-17

Was an incredible drop in entropy responsible for the Big Bang? If that’s the case, this would lead us to conclude that a great many other things are possible, including the likelihood that you are a Boltzmann Brain. Try The Great Courses Plus at http://ow.ly/4anY30acloO

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Previous Episode:
The Oh My God Particle
https://www.youtube.com/watch?v=osvOr5wbkUw

The second Law of Thermodynamics tells us that everything moves towards a state of greater entropy, but it is low entropy that enables galaxies, stars, planets and human beings. The lowest entropy state that we’re aware of in our universe was right before the Big Bang. The entirety of our own universe was condensed to a microscopic size. What caused this extreme low entropy? If it was caused by a random fluctuation in particles that implies that a great many other things are possible due to the random fluctuations of particles. One of the strangest of those possibilities is that of the Boltzmann Brain. If the Big Bang was caused by random entropic fluctuations then it is much more likely you are a Boltzmann Brain than that you are a human being.

Written and Hosted by Matt O’Dowd
Produced by Rusty Ward
Graphics by Kurt Ross
Made by Kornhaber Brown (www.kornhaberbrown.com)

The Great Courses Plus is currently available to watch through a web browser to almost anyone in the world and optimized for the US market. The Great Courses Plus is currently working to both optimize the product globally and accept credit card payments globally.

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Uploaded 03-05-17

Neil deGrasse Tyson sits down with Matt to discuss Ancestor Simulations. And check out Matt and Neil discussing how sure we are about our map of the universe https://youtu.be/6Ng1wwW6AeE You can subcribe to Startalk right here https://www.youtube.com/subscription_center?add_user=startalkradio

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Previous Episode:
The Boltzmann Brain
https://www.youtube.com/watch?v=nhy4Z_32kQo

The Oh My God Particle
https://www.youtube.com/watch?v=osvOr5wbkUw

The idea that our reality is a simulation is not as far-fetched as you may think. Many philosophers, scientists and tech-billionaires are seriously considering not just the possibility but the high probability that our civilization may be a program being run by another, more advanced alien civilization.

Written and Hosted by Matt O’Dowd
Produced by Rusty Ward
Graphics by Kurt Ross
Made by Kornhaber Brown (www.kornhaberbrown.com)

Comments answer by Matt:

0xFFF1
https://www.youtube.com/watch?v=osvOr5wbkUw&lc=z12lxde4hoyvhn4mi23sjnwjrwnljxe3m

KohuGaly
https://www.youtube.com/watch?v=nhy4Z_32kQo&lc=z13miz0bsnbzfrkpi04cflm5ykuluxbzeug0k

Henry School
https://www.youtube.com/watch?v=nhy4Z_32kQo&lc=z12av3hgurvuin2lo225gphqhwysj5lft

exurb1a
https://www.youtube.com/watch?v=nhy4Z_32kQo&lc=z135gzlznojtjzitt23rxl1zmzi0gx3ha04

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Uploaded 10-05-17

The first total solar eclipse in over 40 years is about to hit the United States. 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. And be sure to check out Vanessa Hill’s documentary Mutant Menu https://www.youtube.com/watch?v=NrDM6Ic2xMM

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Previous Episode:
Ancestor SImulations with Neil deGrasse Tyson
https://www.youtube.com/watch?v=hmVOV7xvl58

Get your eclipse glasses ready because the a total solar eclipse is an astronomical event unlike any other.

Written by Alexandra Yep and Matt O’Dowd
Hosted by Matt O’Dowd
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Made by Kornhaber Brown (www.kornhaberbrown.com)

Comments answered by Matt:

Skiwi
https://www.youtube.com/watch?v=hmVOV7xvl58&lc=z130cjxjkvbbv1vmq22uzdyhyoqthlhxa04

Bubbles
https://www.youtube.com/watch?v=hmVOV7xvl58&lc=z134sddyfzfjwfjeq22kzb2wrmundt4la

Shiva Rajbhandari
https://www.youtube.com/watch?v=hmVOV7xvl58&lc=z134fnfpvlzpurfux23gfnfr5kbcjjcjr04

Jason 5499 5499
https://www.youtube.com/watch?v=hmVOV7xvl58&lc=z12vttuy0lups1b5q04cijiz2sbkjh1ydmc0k

CYN MMA
https://www.youtube.com/watch?v=hmVOV7xvl58&lc=z12dipegnm2jsbvxc04cjvjjlkektdi5wfc

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Uploaded 17-05-17

How will humanity evolve after landing and living on Mars? Try 23andMe at http://23andme.com/spacetime And check out the new PBS Digital Studios channel Above the Noise https://www.youtube.com/channel/UC4K10PNjqgGLKA3lo5V8KdQ

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Previous Episode:
The Great American Eclipse
https://www.youtube.com/watch?v=nsWhE22i4FM

What will become of humanity after spend a few hundred years on Mars? What will happen after a few thousand? Evolution has, and still is, shaping humanity in rather drastic ways. How long will humans stop being human and become Martian?

Written and Hosted by Matt O’Dowd
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Comments answer by Matt:

Martin Kettling
https://www.youtube.com/watch?v=nsWhE22i4FM&lc=z12qibnb5qedg3m5z04cinshttjbydrrj4s

venkata raju Pothuri
https://www.youtube.com/watch?v=nsWhE22i4FM&lc=z124exgrmxm5gvzkr23rxnsjssr3f3yml

Ifslayanct
https://www.youtube.com/watch?v=nsWhE22i4FM&lc=z12gxzhyzpe2g55ex23hilqjqqebgpc1l

Zach Grall
https://www.youtube.com/watch?v=nsWhE22i4FM&lc=z12ztlia1tu4xvqa504cflzrwp3xt3l4rws0k

Matt Dill
https://www.youtube.com/watch?v=nsWhE22i4FM&lc=z13acjswqpq2wtlq404civoihxzuj5gga0s

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Uploaded 31-05-17

Population III stars were the very first stars in our universe and far larger than any we can see today. Where are they now? Start your Audible trial today at http://www.audible.com/spacetime

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Previous Episode:
Martian Evolution
https://www.youtube.com/watch?v=vLR_a1MAy9I

Soon after the Big Bang, the first generation of monstrously large stars ignited, lit up the universe, and then died. The resulting swarms of supernova explosions enriched the universe with the first heavy elements and LOTs of black holes. They shaped everything that came after. These were the stars of Population III, and they are one of the most enduring mysteries in astrophysics.

Hosted by Matt O’Dowd
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Comments answer by Matt:

Better and Better
https://www.youtube.com/watch?v=vLR_a1MAy9I&lc=z123w5aomzqign4em23th3ejwkepcfhiv04

Matt b
https://www.youtube.com/watch?v=vLR_a1MAy9I&lc=z12jihfrcnbqgznpp04cj1pqqxjgg3m4rzw0k

Peregrin O’Connor
https://www.youtube.com/watch?v=vLR_a1MAy9I&lc=z122iroyzvvehplyn04chxswuwmqunso2wk0k

Saleem Says
https://www.youtube.com/watch?v=vLR_a1MAy9I&lc=z121cf0y2lakg1jcw230uz5bfx3xcbrub

David Webster
https://www.youtube.com/watch?v=vLR_a1MAy9I&lc=z13cezgi1vubsbwkp23zjt1xbsumwvysw

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Uploaded 07-06-17

Could the mysterious Cold Spot found in the CMB be the result of a collision with a bubble universe? Try 23andMe at http://23andme.com/spacetime
____________________________________________________

[CORRECTION: The calculated ISW cooling from cold spot observed voids is 0.000032 Kelvin not 0.032 K as is listed on screen, the actual cold spot temperature differential is 0.000150 Kelvin not 0.15 K, and the actual ISW cooling from the control region is 0.000014 Kelvin not 0.014 K. The actual control region temperature differential is 0.000015 Kelvin not 0.015K. Thanks to Chris Morong for catching this discrepancy!]

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Previous Episode:
The Fate of the First Stars
https://www.youtube.com/watch?v=4pSUtWBiuB4

Space Time Journal Club examines Evidence Against a Supervoid Causing the CMB Cold Spot
https://arxiv.org/abs/1704.03814

If you study a map of the Cosmic Microwave Background, or CMB, you may notice a large, deep blue splotch on the lower right. This area, creatively named the Cold Spot. Is this feature a statistical fluke, the signature of vast supervoids, or even the imprint of another universe?

Written by Matt O’Dowd and Alexandra Yep
Hosted by Matt O'Dowd
Produced by Rusty Ward
Graphics by Kurt Ross
Made by Kornhaber Brown (www.kornhaberbrown.com)

Resources:
Local Voids as the Origin of Large Scale CMB Anomalies
https://arxiv.org/abs/astro-ph/0602478

Watching Worlds Collide
http://iopscience.iop.org/article/10.1088/1475-7516/2009/04/025

Comments answer by Matt:

Fjellreven
https://www.youtube.com/watch?v=4pSUtWBiuB4&lc=z12cydr5qvbsjpnja04cftmasve4uz1os40

yeme
https://www.youtube.com/watch?v=4pSUtWBiuB4&lc=z13xstcqcwzetxvqr04cef3haoapz1oiork0k

myky992
https://www.youtube.com/watch?v=4pSUtWBiuB4&lc=z12rtll43pybfnifk23tjftzhnb2xd023

Andrew Wright
https://www.youtube.com/watch?v=4pSUtWBiuB4&lc=z12svntwkwumv1n3l23mzlvomtr2zfjtg

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Uploaded 21-06-17

Paul Dirac’s insights into the nature of Quantum Mechanics laid the foundation for Quantum Field Theory and predicted the existence of anti-matter. Part 1 in our series on Quantum Field Theory. Try Skillshare at http://skl.sh/spacetime

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Book recommendations:
The Quantum Divide, by Christopher Gerry and Kimberley Bruno
The Character of Physical Law, by Richard Feynman

Previous Episode:
Supervoids vs Colliding Universes
https://www.youtube.com/watch?v=lrS0rxX-UhA

It’s 1928. Over the past quarter century, the greatest geniuses of the modern era discovered the two keys to the fundamental nature of reality. Einstein’s theories of special and general relativity had changed forever the way we think of motion, space, and time. And the emerging field of quantum mechanics had radically altered our understanding of the fundamental building blocks of the universe. Yet this year one brilliant insight would bring these theories together and unveil the quantum fabric of reality. It would also predict the existence of antimatter.

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Graphics by Kurt Ross
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Comments answered by Matt:

Sourcedrop
https://www.youtube.com/watch?v=lrS0rxX-UhA&lc=z12fglgxiqyuzroqx04cjly40pboiddbqt40k

Vhsjpdfg
https://www.youtube.com/watch?v=lrS0rxX-UhA&lc=z13jylhxnpqzwjt5s04cehcilubxjvaoqp40k

Galdo145
https://www.youtube.com/watch?v=lrS0rxX-UhA&lc=z135j5141pmhv1yop04cfdcjmojfgnbqznw0k

Pradhyumn
https://www.youtube.com/watch?v=lrS0rxX-UhA&lc=z122hjuyfybrxpr3a22vctvxhkeahfmwq04

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Prof. Dr. Kenneth Michael Beck
Science Via Markets

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Uploaded 28-06-17

Quantum Electrodynamics is the first true Quantum Field Theory. Part 2 in our series on Quantum Field Theory. Signup for your free trial to The Great Courses Plus here: http://ow.ly/D0Ne30beNrn

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Previous Episode:
Anti-Matter and Quantum Field Theory
https://www.youtube.com/watch?v=hYkaahzFWfo

Quantum mechanics is perhaps the most unintuitive theory ever devised. And yet it’s also the most successful, in terms of sheer predictive power. Simply by following the math of quantum mechanics, incredible discoveries have been made. Its wild success tells us that the mathematical description provided by quantum mechanics reflects deep truths about reality. And by far the most successful, most predictive formulation of quantum mechanics is quantum field theory. It is our best description we have of the fundamental workings of reality. And the first part of quantum field theory that was derived – quantum electrodynamics – is the most precise, most accurate of all.

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Comments answer by Matt:
Feynstein 100
https://www.youtube.com/watch?v=hYkaahzFWfo&lc=z131sffqsqqcfxaai04cgtoghljatf0isjs

Vacuum Diagrams
https://www.youtube.com/watch?v=hYkaahzFWfo&lc=z12is3mb3oj2evimc23md5ipdy2xvb33y

Norbert Laskowski
https://www.youtube.com/watch?v=hYkaahzFWfo&lc=z13pgnpporizujnxn04cgrkr5vedjxmz3rc0k

Christian Haas
https://www.youtube.com/watch?v=hYkaahzFWfo&lc=z13rdjbjiseovl2tn22iur55jxnvifmgt04

John LaBrie
https://www.youtube.com/watch?v=hYkaahzFWfo&lc=z13dtlmqjoesypdgk04cin3jmzmosjpplcw

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Uploaded 07-07-17

How to predict the path of a quantum particle. Part 3 in our Quantum Field Theory Series.

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Previous Episode:
The First Quantum Field Theory
https://www.youtube.com/watch?v=ATcrrzJFtBY

There is a fundamental limit to the knowability of the universe. The Heisenberg uncertainty principle tells us that the more precisely we try to define one property, the less definable is its counterpart. Knowing a particle’s location perfectly means its velocity is unknowable. But unmeasured properties are not just uncertain; they are undefined. Quantum mechanics seems to imply that ALL possible properties, paths, or events that could reasonably occur between measurements DO occur. Whether or not this is true, a mathematical description of this crazy idea led to the most powerful expression of quantum mechanics ever devised: Richard Feynman’s path integral formulation.

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Comments answer by Matt:

Satya Prakash
https://www.youtube.com/watch?v=ATcrrzJFtBY&lc=z12bv5hpgoyadn20522zfvo5eur2vftyy04

Jakub Mintal
https://www.youtube.com/watch?v=ATcrrzJFtBY&lc=z13pvhcyeyj1uzqxv04cejkbtsm1shfgkug0k

The EEZZ
https://www.youtube.com/watch?v=ATcrrzJFtBY&lc=z12bdbax0ymdgvqec23ps1pyovjuh3zv2

Lazarus The adventurer
https://www.youtube.com/watch?v=ATcrrzJFtBY&lc=z13pgd0z4uudt55fa22nthxykxilfbrcy

ForTiorI
https://www.youtube.com/watch?v=ATcrrzJFtBY&lc=z123hrop2tmlhnx1l23fdznq4q24ft4iw04

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Uploaded 12-07-17

How do you calculate infinite quantum outcomes? Feynman Diagrams. Get your first two months of Curiosity Stream for free by going https://curiositystream.com/spacetime and using the promo code “spacetime” at sign up.

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Previous Episode:
Feynman’s Infinite Quantum Paths
https://www.youtube.com/watch?v=vSFRN-ymfgE

The equations of quantum field theory allow us to calculate the behaviour of subatomic particles by expressing them as vibrations in quantum fields. But even the most elegant and complete formulations of quantum physics – like the Dirac equation or Feynman’s path integral - become impossibly complicated when we try to use them on anything but the most simple systems. But physicists tend to interpret “that’s impossible” as “I dare you to try!” And try they did. First they expressed these impossible equations in approximate but solvable forms. Then they tackled the pesky infinities that kept appearing in these new, approximate equations. Finally, the entire mess was ordered into a system that mere humans could deal using the famous Feynman diagrams.

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Christian Haas
https://www.youtube.com/watch?v=vSFRN-ymfgE&lc=z132vnrhvkq1d3wbi04cdvewopzqjhtidn40k

Psy Kosh
https://www.youtube.com/watch?v=vSFRN-ymfgE&lc=z12evvsbtvahjprpx04cclc4nprifxdzwcc

lohphat
https://www.youtube.com/watch?v=vSFRN-ymfgE&lc=z123gzmhdyezideg504chbuy2rnne1tjx5c

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Uploaded 19-07-17

Anti-Satellite weaponry, giant X-ray lasers and kinetic impact missiles nicknamed the “Rods from God.” Find out about the history of the real star wars that have been waged over the past 50 years. Get a one month trial of The Great Courses Plus at http://ow.ly/e5be30beNu3

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Previous Episode:
Solving the Impossible in Quantum Field Theory
https://www.youtube.com/watch?v=oQ1WZ-eJW8Y

The decades directly following World War II were a time of optimism in many ways. Industrialization was finally improving quality of life for a lot of us, science was making incredible bounds, and our sights were set on the stars. It seemed to many that we were on a trajectory to a space-faring technological utopia. The United Federation of Planets was just around the corner. But the possibility of a much darker space age also loomed: one in which the space around the Earth became highly militarized, and in fact massively weaponized.

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RosieisaBoss
https://www.youtube.com/watch?v=oQ1WZ-eJW8Y&lc=z12wdnazlyb0dtblw22fhbgb4lmrvfrle

Nicholas Aiello
https://www.youtube.com/watch?v=oQ1WZ-eJW8Y&lc=z13rcftxeprthjkmc22cstaploneybp2s

Zach Crawford
https://www.youtube.com/watch?v=oQ1WZ-eJW8Y&lc=z13kd3wg4v3tx1xvo23jwrwzrorah5jfa

NuclearCraft Mod
https://www.youtube.com/watch?v=oQ1WZ-eJW8Y&lc=z13xurhbopmywd4ue22lvzujjnm4cpifj

Lophat
https://www.youtube.com/watch?v=oQ1WZ-eJW8Y&lc=z12bhbf4irfzfxqw204chxarfyncfdqgbng0k

OnlyNameLeftHere
https://www.youtube.com/watch?v=oQ1WZ-eJW8Y&lc=z130j5qprnr2up0tj23us1qrqxyeyhr3z

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Uploaded 26-07-17

Unlock the secrets of Feynman Diagrams. Part 5 in our Quantum Field Theory series. And if you're submitting an answer to our challenge question email your answer by August 2nd to pbsspacetime [AT] gmail.com with the subject line "Feynman Diagram Challenge."

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Previous Episode:
The Real Star Wars
https://www.youtube.com/watch?v=Q8shnjlGwmg

Feynman’s path integral shows us that, to properly calculate the probability of a particle traveling from point A to point B, we need to add up the contributions from all conceivable paths between those points – including the impossible paths! In fact we can go even further: according to Feynman’s approach, every conceivable happening that leads from a measured initial state to a measured final state DOES in a sense happen. To calculate the probability of any quantum system evolving from one state into any other state we need to sum over every conceivable intermediate state. This is impossible because there are infinite possible intermediate states.

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Superphilipp
https://www.youtube.com/watch?v=Q8shnjlGwmg&lc=z13act14kwqcvv2nn22muvvztxqnjjryt04

Lewinham
https://www.youtube.com/watch?v=Q8shnjlGwmg&lc=z12ajhwg3nubdnhaz04cfjfjumr2w5krek40k

Myrmidon
https://www.youtube.com/watch?v=Q8shnjlGwmg&lc=z12xupq5qqiqdbl4h04chd4x0syuxfnb1nk0k
Sure people love Star Wars. But I think they missed a golden opportunity to call the project Ronald Ray-gun.

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Uploaded 02-08-17

Why does the universe seem to be moving in one particular direction?

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Previous Episode:
The Secrets of Feynman Diagrams
https://www.youtube.com/watch?v=fG52mXN-uWI

Space is not static. Everything moves. Planets orbit stars, stars orbit within galaxies, galaxies whirl within the gravitational fields of giant clusters. And of course, the universe is expanding; distant galaxies are thrust apart from each other as the space between them grows. But there’s no preferred direction to any of this motion. Motion due to the expansion of the universe – what we call the Hubble flow – is equal in all directions. The random motion of galaxies – what we call their peculiar motion – should also have no preferred direction. On the largest scales of the universe, there should be no preference for up or down or left or right. At least that’s what we thought. Observations of the cosmic microwave background suggest that the galaxy clusters across the cosmos may be moving, ever so slightly, towards the same point beyond the cosmic horizon. We call this dark flow.

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VacuumDiagrams
https://www.youtube.com/watch?v=fG52mXN-uWI&lc=z12mir3gvw20gxvnq23md5ipdy2xvb33y

Samuel Benda
https://www.youtube.com/watch?v=fG52mXN-uWI&lc=z12vgjnosweevr1kw22oct0jfwugib4pu04

JoJoModding
https://www.youtube.com/watch?v=fG52mXN-uWI&lc=z134h3i4zuqowhcow04cjfeh3pnmwpmirbk

Squid Master
https://www.youtube.com/watch?v=fG52mXN-uWI&lc=z123ynkp0m3uhhr4h04cjvxwpkvyvvmo2ek

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Uploaded 10-08-17

Could it be that all the electrons in the universe are simply one, single electron moving back and forth through time?

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Previous Episode:
Dark Flow
https://www.youtube.com/watch?v=xgdNBQCdhdA

In the spring of 1940, the great physicist John Archibald Wheeler had a flash of insight. He picked up the phone and called Richard Feynman. The fateful conversation began, “Feynman, I know why all electrons have the same charge and the same mass." "Why?" asked Wheeler’s former graduate student. "Because, they are all the same electron!" Wheeler went on to describe the One-Electron Universe idea: that there exists only one electron, and that electron traverses time in both directions. It bounces in time, eventually traversing the entire past and future history of the universe in both directions, and interacting with itself countless times on each pass. In this way it fills the universe with the appearance of countless electrons. And when the electron is moving backwards in time it is a positron; the antimatter counterpart of the electron.

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0xFFF1
https://www.youtube.com/watch?v=xgdNBQCdhdA&lc=z23sjnwjrwnljxe3macdp435v2eqfl1uknp1kknjllxw03c010c

Daniel Grass
https://www.youtube.com/watch?v=xgdNBQCdhdA&lc=z230gbubioqjyn1vfacdp43azemsjdresxvjbu412tdw03c010c

M Paulson
https://www.youtube.com/watch?v=xgdNBQCdhdA&lc=z221xpzafrikhxyjf04t1aokgiuxpnkzxeknjelcsx0jbk0h00410

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Uploaded 16-08-17

Earth has its share of monster storms, but even our most powerful hurricanes are a breeze compared to the great, planet-sized tempests of the gas giants. LegalZoom is not a law firm or a substitute for the advice of an attorney. Get 15% off your next purchase at https://www.legalzoom.com/spacetime. ...

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Previous Episode:
The One-Electron Universe
https://www.youtube.com/watch?v=9dqtW...

The great vortices of the Jovian planets are true storms, analogous in many ways to Earth’s hurricanes. There are, of course, some differences. For example, these storms are as big as entire planets. The largest and oldest storm in the solar system is Jupiter’s Great Red Spot, stretching an incredible two to three times the diameter of the planet Earth. Meanwhile the fastest winds ever measured, clocking fifteen hundred miles per hour, once raged in Neptune’s Great Dark Spot. Saturn’s Polar Vortex is a 20,000-mile-wide monster shaped like a hexagon. Even plain-looking Uranus hides USA-sized hurricanes below its methane haze. There are many unsolved mysteries surrounding these epic storms. We may be close to finding some answers, following the Juno spacecraft’s recent flyby of Jupiter’s Great Red Spot.

Juno's interactive website: https://www.missionjuno.swri.edu/

Written by Alexandra Yep and Matt O’Dowd
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Comments answer by Matt:

Andres64
https://www.youtube.com/watch?v=9dqtW...

Keith Gaughan
https://www.youtube.com/watch?v=9dqtW...

Vacuum Diagrams
https://www.youtube.com/watch?v=9dqtW...

youteub akount
https://www.youtube.com/watch?v=9dqtW...

Don Solaris
https://www.youtube.com/watch?v=9dqtW...

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Uploaded 24-08-17

What does life look like from space?
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In 1990, an experiment conceived by Carl Sagan was performed using using the Galileo spacecraft. The purpose? To detect life on a planet based on measurements by a space probe. The experiment was successful, and abundant life was unequivocally confirmed. That planet? The Earth. Now, a quarter century later, we’re on the verge of conducting that same experiment on a world orbiting another star.

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Uploaded 30-08-17

Black holes are very well known but... What is a White Hole?
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Previous Episode:
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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.

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Uploaded 13-09-17

LIGO may have just detected gravitational waves from the collision of two Neutron Stars. And go to http://curiositystream.com/spacetime
for two months of free Curiosity Stream. Use the promo code "spacetime" during the sign-up process.

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Previous Episode:
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Links to the videos mentioned:
https://www.youtube.com/watch?v=gw-i_VKd6Wo
https://www.youtube.com/watch?v=1Tstyqz2g7o
https://www.youtube.com/watch?v=eJ2RNBAFLj0
https://www.youtube.com/watch?v=xx4562gesw0&t=71

Last year LIGO announced the detection of gravitational waves from the merger of two black holes. The science world went a little crazy. Only a few weeks ago a new rumour emerged: that LIGO had, for the first time, spotted gravitational waves from the collision of a pair of neutron stars. If it’s true, some long-standing astrophysical mysteries are about to be unlocked.

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Uploaded 20-09-17

The mysteries of our universe seem limitless. However to unlock them, we’re going to need some incredible technologies to peer deeper and more sharply into space time.

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The Kepler mission has determined that terrestrial planets - that is, rocky planets like our Earth are extremely common, and may orbit most stars in the Milky Way. But these planets are extremely difficult to directly image because they’re dense and small. Our Sun is about ten billion times brighter than Earth. Train a distant telescope on us, and it will be overwhelmed by the Sun’s rays. So how can we find terrestrial planets around stars light years away?

Written by Alex Yep and Matt O’Dowd
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