Page 17 of 44

What Happens After the Universe Ends?

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Conformal Cyclic Cosmology is a story of the origin and the end of our universe from great mathematical physicist Sir Roger Penrose. It’s goes like this: the infinitely far future, when the universe has expanded exponentially to to an unthinkably large size, and every black hole and particle has decayed into faint radiation …. that infinite stretch of space and time is identically the SAME THING as the infinitesimal and instantaneous big bang of a new universe, and our universe is just one in an endless chain.

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

#space #astrophysics #universe

Previous Episodes Discussed
Geometry of Causality – https://www.youtube.com/watch?v=1YFrISfN7jo
Higgs Mechanism – https://www.youtube.com/watch?v=kixAljyfdqU

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Can Viruses Travel Between Planets?

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With the global pandemic of Covid 19 still encompassing the world, we are generally not big fans of viruses right now. But we sure are thinking about them a lot. That’s right, even astrophysicists are pondering these bizarre little critters. In fact, astrovirology, although very new, is actually an emerging subfield of astrobiology. And that’s because it turns out viruses don’t just influence organisms – they’re incredibly important on a planetary scale. Perhaps an interplanetary scale.

Virology Links:
Dr. Vincent Racaniello’s Columbia University virology course:
https://www.youtube.com/playlist?list=PLGhmZX2NKiNldpyRUBBEzNoWL0Cso1jip

PBS Eons Where do Viruses Come From?
https://youtu.be/X31g5TB-MRo

Hosted by Matt O’Dowd
Written by Katie McCormick & Matt O’Dowd
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#space #astrophysics #astrovirology

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Does Gravity Require Extra Dimensions?

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It’s been 120 years since Henry Cavendish measured the gravitational constant with a pair of lead balls suspended by a wire. The fundamental nature of gravity still eludes our best minds – but those secrets may be revealed by turning back to the Cavendish experiment. That steampunk contraption may even reveal the existence of extra dimensions of space.

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Hosted by Matt O’Dowd
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#space #astrophysics #gravity

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Mapping the Multiverse

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This is a map of the multiverse. Or in physics-ese, it’s the maximally extended Penrose diagram of a Kerr spacetime. And in english: when you solve Einstein’s equations of general relativity for a rotating black hole, the universe does not come to an abrupt halt at the bottom of the gravitational pit. Instead, a path can be traced out again but you do not end up in the universe that you started in. Like I said, it’s a map of the multiverse.

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#space #astrophysics #multiverse

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How Luminiferous Aether Led to Relativity

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As the 19th century came to a close, physicists were feeling pretty satisfied with the state of their science. The great edifice of physical theory seemed complete. A few minor experiments remained to verify everything. Little did those physicists know that one of those experiments would bring the entire structure crashing down paving the way for the physics revolution of the 20th century.

Hosted by Matt O’Dowd
Written by Sarah Wells & Matt O’Dowd
Graphics by Leonardo Scholzer, Yago Ballarini, & Pedro Osinski
Directed by: Andrew Kornhaber
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End Credits Music by J.R.S. Schattenberg: https://www.youtube.com/channel/UCRl6-nb4iOnsij-vnpAjp0Q

#space #astrophysics #sciencehistory

A Special Note from writer Sarah Wells:

Sarah Wells would like to dedicate the writing and inspiration for this episode to Louis Colonna-Romano, a Clark University physics instructor who told the story of Albert Michelson’s fantastic “failure” to generations of physics freshmen. Lou’s kind mentorship and infectious enthusiasm for physics inspired every student who came into his office, including this video’s writer.

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How We Know The Universe is Ancient

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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 & Matt O’Dowd
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#space #astrophysics #cosmology

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Will Wormholes Allow Fast Interstellar Travel?

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From Stargate to Interstellar, wormholes are our favorite method for traveling across fictional universes. But they are also a very serious field of study for some of our greatest minds over the last century. So what’s the holdup? When do we get to wormhole ourselves out of here?

Hosted by Matt O’Dowd
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#space #astrophysics #interstellar

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Was the Milky Way a Quasar?

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The Milky Way galaxy is relatively calm by the destructive standards of the rest of the Universe, and compared to its own very violent past. But just recently we discovered that its violent past was much more recent than we thought – and could even happen again.

Hosted by Matt O’Dowd
Written by Emily Diebert & Matt O’Dowd
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Directed by: Andrew Kornhaber
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#space #astrophysics #spacetime

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How We Know The Earth Is Ancient

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In astronomy we talk about billions of years like it’s no big deal. But how can we be sure about timescales so far beyond the capacity for human intuition? Our discovery of what we now call deep time is very recent – as recent as our discovery of the true spatial vastness of our universe. And it came as scientists tried to measure the age of the Earth. What they found was as shocking and humbling as anything seen through the telescope.

Hosted by Matt O’Dowd
Written by Dan Falk & Matt O’Dowd
Graphics by Leonardo Scholzer, Yago Ballarini, & Pedro Osinski
Directed by: Andrew Kornhaber
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End Credits Music by J.R.S. Schattenberg: https://www.youtube.com/channel/UCRl6-nb4iOnsij-vnpAjp0Q

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Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "wp_print_speculation_rules" not found or invalid function name in /home/milljtdi/millennium3.info/wp-includes/class-wp-hook.php:324 Stack trace: #0 /home/milljtdi/millennium3.info/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #1 /home/milljtdi/millennium3.info/wp-includes/plugin.php(517): WP_Hook->do_action() #2 /home/milljtdi/millennium3.info/wp-includes/general-template.php(3208): do_action() #3 /home/milljtdi/millennium3.info/wp-content/themes/hemingway/footer.php(69): wp_footer() #4 /home/milljtdi/millennium3.info/wp-includes/template.php(810): require_once('/home/milljtdi/...') #5 /home/milljtdi/millennium3.info/wp-includes/template.php(745): load_template() #6 /home/milljtdi/millennium3.info/wp-includes/general-template.php(92): locate_template() #7 /home/milljtdi/millennium3.info/wp-content/themes/hemingway/index.php(91): get_footer() #8 /home/milljtdi/millennium3.info/wp-includes/template-loader.php(106): include('/home/milljtdi/...') #9 /home/milljtdi/millennium3.info/wp-blog-header.php(19): require_once('/home/milljtdi/...') #10 /home/milljtdi/millennium3.info/index.php(17): require('/home/milljtdi/...') #11 {main} thrown in /home/milljtdi/millennium3.info/wp-includes/class-wp-hook.php on line 324