Cool Worlds

Three years ago, we detected the first interstellar object passing through the Solar System, `Oumuamua. Ever since, astronomers have been debating the origins of this strange body. Whilst many hypothesize an asteroid, the media is ablaze with the possibility that it could be alien technology. Join us today for a discussion of this theory and the counter-arguments proposed. Written & presented by Prof David Kipping. Thanks to Dr Sean Raymond for fact checking - check out his blog www.planetplanet.net and astro poetry book https://www.amazon.com/dp/B08LFZZWGZ You can now support our research program and the Cool Worlds Lab at Columbia University: https://www.coolworldslab.com/support Get Stash here! https://teespring.com/stores/cool-worlds-store Thank-you to our supporters K. Clark, T. Widdowson, D. Smith, S. Hackley, M. Sloan, L. Sanborn, K. Kantor, P. Herman, C. Bottaccini, D. Brunk, D. Daughaday, S. Fincher, J. Kindred, A. Jones, J. Allen, S. Baldwin, J. Black, S. Brownlee, D. Denholm, T. Dorais, G. Downton, E. Urrestarazu, G. Fulton, S. Griffiths, P. Halloran, J. Jurcevic, N. Kildal, J. Kobernick, W. Kobernick, V. Kremer, M. Lijoi, S. Loftin, B. Loizides, A. Maslyanchuk, B. Matson, O. Mcintyre, L. Mitchell, A. Pelletier, J. Rivillas, B. Robinson, Z. Star, L. Steely, E. Stefan-Matyus, M. Steven, E. West, B. York, T. Zanjonc, P. Gowd, S. Kelsey, P. Kommareddy, C. Wolfred, D. Vennel, E. Dessoi, F. Naeem, F. Rebolledo, H. Laging, J. Falls, P. Rutherford, T. Leger, L. Skov, D. Roberts, E. Wilson, I. Baskerville, J. Bassnett, J. Shackleford, I. Johnstone, G. Suter, I. Hopcraft, J. Valdes, P. Akrill-Misso, W. Robertson, E. Orman, G. Ingham, D. Van Hecke, J. Pilloff, T. Bernhard. D. Dianovszki, E. Cook, S. Mass, T. Richards, T. Lancaster, C. Stouffer, G. Benson, A. de Vaal, C. Diamantis, J. Wenzel, M. Elliot, M. Wallstab, S. Bialek, B. Thomson, B. Daniluk, B. Bowen, D. Jacobson, D. Lukens, G. Coogan, J. Bushong, M. Wacinski, M. O'Donnell, M. Forbes, S. Vystoropsk

Perhaps it's a part of what makes us human, to explore the next frontier, to seek out new worlds... Today, we're excited to share a new planet discovered outside of our Solar System by the Cool Worlds Lab - HD 183579b. Join us to hear about the new strategy we developed to find this object, and why this is a particularly valuable planet discovery. You can support our research program and the Cool Worlds Lab at Columbia University: https://www.coolworldslab.com/support Get Stash here! https://teespring.com/stores/cool-worlds-store Thank-you to our supporters K. Clark, T. Widdowson, D. Smith, S. Hackley, M. Sloan, L. Sanborn, K. Kantor, P. Herman, C. Bottaccini, D. Brunk, D. Daughaday, S. Fincher, J. Kindred, A. Jones, J. Allen, S. Baldwin, J. Black, S. Brownlee, D. Denholm, T. Dorais, G. Downton, E. Urrestarazu, G. Fulton, S. Griffiths, P. Halloran, J. Jurcevic, N. Kildal, J. Kobernick, W. Kobernick, V. Kremer, M. Lijoi, S. Loftin, B. Loizides, A. Maslyanchuk, B. Matson, O. Mcintyre, L. Mitchell, A. Pelletier, J. Rivillas, B. Robinson, Z. Star, L. Steely, E. Stefan-Matyus, M. Steven, E. West, B. York, T. Zanjonc, P. Gowd, S. Kelsey, P. Kommareddy, C. Wolfred, D. Vennel, E. Dessoi, F. Naeem, F. Rebolledo, H. Laging, J. Falls, P. Rutherford, T. Leger, L. Skov, D. Roberts, E. Wilson, I. Baskerville, J. Bassnett, J. Shackleford, I. Johnstone, G. Suter, I. Hopcraft, J. Valdes, P. Akrill-Misso, W. Robertson, E. Orman, G. Ingham, D. Van Hecke, J. Pilloff, T. Bernhard. D. Dianovszki, E. Cook, S. Mass, T. Richards, T. Lancaster, C. Stouffer, G. Benson, A. de Vaal, C. Diamantis, J. Wenzel, M. Elliot, M. Wallstab, S. Bialek, B. Thomson, B. Daniluk, B. Bowen, D. Jacobson, D. Lukens, G. Coogan, J. Bushong, M. Wacinski, M. O'Donnell, M. Forbes, S. Vystoropskyi, S. Carr, T. Laird, S. Lee, T. Tschopp W. van den Wollenberg, Z. Danielson, Z. Turner, E. Fernandes, E. Vinci, L. Holc, S. Grant, S. Seyer, J. Patrick-Saunders, P. Conroy, R. Clifton, C. Butler, M. Peraic, N. Cordov

A century ago, many thought Mars was scored by a canal system constructed by an advanced civilization - an idea championed by astronomer Percival Lowell. Why? How did an astronomer come to this conclusion? Today we explore the canal phenomenon and discuss why it's a crucial allegory from history - pertinent now more than ever. Written & presented by Prof David Kipping. You can support our research program and the Cool Worlds Lab at Columbia University: https://www.coolworldslab.com/support Get Stash here! https://teespring.com/stores/cool-worlds-store Thank-you to our supporters L. Sanborn, K. Clark, T. Widdowson, D. Smith, S. Hackley, M. Sloan, P. Herman, C. Bottaccini, D. Daughaday, S. Fincher, J. Kindred, A. Jones, J. Allen, S. Baldwin, S. Brownlee, D. Denholm, G. Fulton, S. Griffiths, P. Halloran, J. Jurcevic, N. Kildal, V. Kremer, M. Lijoi, S. Loftin, A. Maslyanchuk, B. Matson, O. Mcintyre, L. Mitchell, A. Pelletier, B. Robinson, Z. Star, L. Steely, E. West, B. York, T. Zanjonc, P. Gowd, S. Kelsey, C. Wolfred, E. Dessoi, F. Naeem, F. Rebolledo, H. Laging, T. Leger, L. Skov, E. Wilson, I. Baskerville, J. Bassnett, J. Shackleford, I. Johnstone, G. Suter, I. Hopcraft, P. Akrill-Misso, W. Robertson, G. Ingham, D. Van Hecke, J. Pilloff, C. Stouffer, G. Benson, A. de Vaal, J. Wenzel, M. Elliot, M. Wallstab, B. Thomson, B. Daniluk, B. Bowen, D. Jacobson, G. Coogan, J. Patrick-Saunders, J. Bushong, M. O'Donnell, M. Forbes, P. Conroy, R. Clifton, S. Vystoropskyi, S. Carr, T. Laird, S. Lee, T. Tschopp, Z. Danielson, Z. Turner, E. Fernandes, E. Vinci, L. Holc, S. Grant, C. Butler, M. Peraic, C. Fitzgerald, B. Meraz, R. Ybarra, V. Alexandrov, R. Sinai, L. Macchia, C. Souter, M. Gillette, J. Rockett, T. Jeffcoat, D. Roos, D. Poole, G. Fuhrmann, H. Jensen, J. Flynn, L. Chambers, M. Archer & A. Bradaric. ::References:: ► Lowell, P., 1895, "Mars", Houghton, Mifflin and Co., MA ► Lowell, P., 1906, "Mars and Its Canals", The Macmillian Company, NY ► Lowell, P., 19

Sixty years ago Frank Drake wrote down an equation that has become one of the most famous in astronomy - the Drake Equation. This formula, aiming to estimate the number of alien civilizations communicating within the galaxy, has been celebrated, abused and criticized. Today, we are taking a deep dive into this special equation in a two part special. Written and presented by Prof David Kipping. Thanks to Jason Wright and Nadia Drake for help with this video. This video was sponsored by CuriosityStream - sign up for CuriosityStream here: https://curiositystream.com/CoolWorlds and be sure to use the code: "CoolWorlds" WATCH PART TWO HERE: https://youtu.be/kliJ-CFVLeE You can support our research program and the Cool Worlds Lab at Columbia University: https://www.coolworldslab.com/support Get Stash here! https://teespring.com/stores/cool-worlds-store Thank-you to our supporters T. Widdowson, D. Smith, M. Sloan, L. Sanborn, C. Bottaccini, D. Daughaday, A. Jones, J. Allen, S. Brownlee, G. Fulton, N. Kildal, M. Lijoi, Z. Star, E. West, T. Zanjonc, C. Wolfred, F. Rebolledo, T. Leger, L. Skov, G. Suter, M. Elliot, M. Wallstab, B. Daniluk, J. Patrick-Saunders, M. Forbes, S. Vystoropskyi, S. Lee, Z. Danielson, C. Fitzgerald, V. Alexandrov, L. Macchia, C. Souter, M. Gillette, T. Jeffcoat, H. Jensen, F. Linker, J. Rockett, N. Fredrickson, N. Geisler, P. Cleeves, R. Case & B. Desormeaux. ::References:: ► Kipping, D., 2021, "A Stationary Drake Equation Distribution as a Balance of Birth-death Processes", RNAAS, 5, 44: https://iopscience.iop.org/article/10.3847/2515-5172/abeb7b ::Check out Dr. Sutter's videos for more:: ► Paul M. Sutter - The Equation is Useless (Part 1): https://youtu.be/6B8yAxiPbk0 ► Paul M. Sutter - The Equation is Useless (Part 2): https://youtu.be/B8-k8ZoMaa0 ::Music:: Music licensed by SoundStripe.com (SS) [shorturl.at/ptBHI], or via Creative Commons (CC) Attribution License (https://creativecommons.org/licenses/by/4.0/), or with

Welcome to Part Two of our deep dive into the Drake Equation. In the second part, we explore the temporal aspect of the Drake Equation and how it illuminates a path towards an alternative formalism - the Birth-Death formalism. Join us as we move forward to the bleeding edge of modern research on the Drake Equation. Written and presneted by Prof David Kipping. Thanks to Jason Wright and Nadia Drake for help with this video. This video was sponsored by CuriosityStream - sign up for CuriosityStream here: https://curiositystream.com/CoolWorlds and be sure to use the code: "CoolWorlds" WATCH PART ONE HERE: https://youtu.be/dM_Pelfc92s You can support our research program and the Cool Worlds Lab at Columbia University: https://www.coolworldslab.com/support Get Stash here! https://teespring.com/stores/cool-worlds-store Thank-you to our supporters T. Widdowson, D. Smith, M. Sloan, L. Sanborn, C. Bottaccini, D. Daughaday, A. Jones, J. Allen, S. Brownlee, G. Fulton, N. Kildal, M. Lijoi, Z. Star, E. West, T. Zanjonc, C. Wolfred, F. Rebolledo, T. Leger, L. Skov, G. Suter, M. Elliot, M. Wallstab, B. Daniluk, J. Patrick-Saunders, M. Forbes, S. Vystoropskyi, S. Lee, Z. Danielson, C. Fitzgerald, V. Alexandrov, L. Macchia, C. Souter, M. Gillette, T. Jeffcoat, H. Jensen, F. Linker, J. Rockett, N. Fredrickson, N. Geisler, P. Cleeves, R. Case & B. Desormeaux. ::References:: ► Kipping, D., 2021, "A Stationary Drake Equation Distribution as a Balance of Birth-death Processes", RNAAS, 5, 44: https://iopscience.iop.org/article/10.3847/2515-5172/abeb7b ::Music:: Music licensed by SoundStripe.com (SS) [shorturl.at/ptBHI], or via Creative Commons (CC) Attribution License (https://creativecommons.org/licenses/by/4.0/), or with permission from the artist ► "Waking Up" by Atlas ► "Always Dreaming" by Caleb Etheridge ► "The Sun is Scheduled to Come Out Tomorrow" by Chris Zabriskie ► "Y" by Joachim Heinrich ► "Fusion" by Indive ► "Cylinder Five" by Chris Zabriskie ►

How fast are you moving? Remarkably you are moving, by some definitions, around a million miles per hour. But, why don't we feel this motion? Is this speed useful in some way? And what does the question of speed really even mean? Join us today as Cool Worlds explores our motion through space. Written and presented by Prof David Kipping. You can support our research program and the Cool Worlds Lab at Columbia University: https://www.coolworldslab.com/support Get Stash here! https://teespring.com/stores/cool-worlds-store Thank-you to our supporters T. Widdowson, D. Smith, M. Sloan, L. Sanborn, C. Bottaccini, D. Daughaday, A. Jones, S. Brownlee, M. Lijoi, Z. Star, T. Zanjonc, C. Wolfred, F. Rebolledo, L. Skov, E. Wilson, M. Elliot, B. Daniluk, J. Patrick-Saunders, M. Forbes, S. Vystoropskyi, S. Lee, Z. Danielson, C. Fitzgerald, V. Alexandrov, L. Macchia, C. Souter, M. Gillette, T. Jeffcoat, H. Jensen, F. Linker, J. Rockett, N. Fredrickson, B. Mlazgar, D. Holland, J. Alexander, B. Edelman, G. Ganguly, T. Plant & D. Alicen. ::Music:: Music licensed by SoundStripe.com (SS) [shorturl.at/ptBHI], or via Creative Commons (CC) Attribution License (https://creativecommons.org/licenses/by/4.0/), or with permission from the artist ► Joachim Heinrich - Y ► Falls - Life in Binary ► The Europa Protoharmonic Symphony Orchestra - Our Guests Have Arrived ► Atlas - Waking Up ► Holiday On The Moon - Everything That Matters ► Indive - Ion ► Chris Zabriskie - Music From Neptune Flux 10 ► Chris Zabriskie - Music From Neptune Flux 4 ► Chris Zabriskie - Cylinder 7 ::Video clips:: ► A Flight Through the Universe by Berkeley Lab/SDSS ► Kuba Jurkowski ► Aryeh Nirenberg @art_only ► BlueTurn with NASA/DSCOVR ► Discovery News - How Fast Are You Moving ► BBC Wonders of the Universe ► Pole Position Motorsport ► Bon Iver - Holocene (NE Direction) ► Earth orbit animation by Brad Freese ► The Expanse - Amazon Studios ► Juno slingshot by NASA/JPL/SwRI ► Voyager anim

Signup for your FREE trial to The Great Courses Plus here: http://ow.ly/x8l230rIoRs - thank you to our sponsors! New research! One-offs... there's something about them, whether it be the first interstellar asteroid or a star behaving in an unprecedented way. These "black swans" capture our attention and imagination but interpreting them is challenged by the inherent scarcity of data. Perhaps no case encapsulates this more than the famous 1977 Wow Signal. Join us today as we discuss our new paper on Black Swan Theory with consequences for the Wow signal. You can support our research program and the Cool Worlds Lab at Columbia University: https://www.coolworldslab.com/support Get Stash here! https://teespring.com/stores/cool-worlds-store Thank-you to our supporters T. Widdowson, D. Smith, M. Sloan, L. Sanborn, C. Bottaccini, D. Daughaday, A. Jones, S. Brownlee, M. Lijoi, Z. Star, T. Zanjonc, C. Wolfred, F. Rebolledo, L. Skov, E. Wilson, M. Elliot, B. Daniluk, J. Patrick-Saunders, M. Forbes, S. Vystoropskyi, S. Lee, Z. Danielson, C. Fitzgerald, V. Alexandrov, L. Macchia, C. Souter, M. Gillette, T. Jeffcoat, H. Jensen, F. Linker, J. Rockett, N. Fredrickson, B. Mlazgar, D. Holland, J. Alexander, E. Hanway, A. Rao, E. Crump & J. Bergman. Correction at 10:19 - the hydrogen line is 1420 MHz not kHz ::Links:: ► Kipping, D. (2021), "Black Swans in Astronomical Data", MNRAS, in press: https://arxiv.org/abs/2104.07693 ► Harp, G., Gray, R., et al., (2020), "An ATA Search for a Repetition of the Wow Signal", AJ, 160, 162: https://doi.org/10.3847/1538-3881/aba58f ► Event Horizon interview with Dr Jerry Ehman: https://youtu.be/x67K-Vq1KWk ► Our previous video about BLC-1: https://youtu.be/lU7h-Mgzk7c ► Breakthrough Listen live-stream about BLC-1: https://youtu.be/qpewt9qEYXw ::Music:: Music licensed by SoundStripe.com (SS) [shorturl.at/ptBHI], or via Creative Commons (CC) Attribution License (https://creativecommons.org/licenses/by/4.0/), or with permi

Is the Universe infinite? Or does it somehow fold in on itself? And if so in what shape? Join us today as explore the size of the Universe. Written and presented by Prof David Kipping, with special thanks to cosmologist Prof Colin Hill for fact checking. You can support our research program and the Cool Worlds Lab at Columbia University: https://www.coolworldslab.com/support Get Stash here! https://teespring.com/stores/cool-worlds-store Thank-you to our supporters T. Widdowson, D. Smith, M. Sloan, L. Sanborn, C. Bottaccini, D. Daughaday, A. Jones, S. Brownlee, M. Lijoi, Z. Star, T. Zanjonc, C. Wolfred, F. Rebolledo, L. Skov, E. Wilson, M. Elliot, B. Daniluk, J. Patrick-Saunders, M. Forbes, S. Vystoropskyi, S. Lee, Z. Danielson, C. Fitzgerald, V. Alexandrov, L. Macchia, C. Souter, M. Gillette, T. Jeffcoat, H. Jensen, F. Linker, J. Rockett, N. Fredrickson, B. Mlazgar, D. Holland, J. Alexander, E. Hanway, J. Molnar & I. Sandaljian. ::References used:: ► Levin, J. (2001), "Topology and the Cosmic Microwave Background", Phys. Rep., 365, 251: https://arxiv.org/abs/gr-qc/0108043 ► de Bernardis et al. (2000), "A Flat Universe from High-Resolution Maps of the Cosmic Microwave Background Radiation", Nature, 404, 955: https://arxiv.org/abs/astro-ph/0004404v1 ► Bennett et al. (2013), "Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Final Maps and Results", ApJS, 208, 20 https://ui.adsabs.harvard.edu/abs/2013ApJS..208...20B/abstract ► Planck Collaboration et al. (2020), "Planck 2018 results. VI. Cosmological parameters", A&A, 641, 60 ► Park, J. (1970), "The concept of transition in quantum mechanics", Fo. of Phys., 1, 23: https://ui.adsabs.harvard.edu/abs/1970FoPh....1...23P/abstract [also https://arxiv.org/abs/1707.06910] ::Music:: Music licensed by SoundStripe.com (SS) [shorturl.at/ptBHI], or via Creative Commons (CC) Attribution License (https://creativecommons.org/licenses/by/4.0/), or with permission from the artist ► Joachim Hein

Visit our sponsor, Brilliant.org: https://brilliant.org/CoolWorlds New research! Join us today as we discuss a new research paper just published in the Proceedings of the National Academy of Sciences from our team - The Red Sky Paradox. → Support our research program: https://www.coolworldslab.com/support → Get Stash here! https://teespring.com/stores/cool-worlds-store THANK-YOU to our supporters T. Widdowson, D. Smith, M. Sloan, L. Sanborn, C. Bottaccini, D. Daughaday, A. Jones, S. Brownlee, Z. Star, T. Zanjonc, C. Wolfred, F. Rebolledo, L. Skov, E. Wilson, M. Elliott, B. Daniluk, J. Patrick-Saunders, M. Forbes, S. Vystoropskyi, S. Lee, Z. Danielson, C. Fitzgerald, V. Alexandrov, L. Macchia, C. Souter, M. Gillette, T. Jeffcoat, H. Jensen, F. Linker, J. Rockett, N. Fredrickson, B. Mlazgar, D. Holland, J. Alexander, E. Hanway, J. Molnar, D. Murphree, S. Hannum, T. Donkin, K. Myers, K. Clawson, M. Sanford, P. Matos, S. Hannum, T. Jawad, T. Schnipper, T. Donkin, T. Moss, K. Myers & M. O'Brien. ::Links:: ► Kipping, D. (2021), "Formulation and resolutions of the red sky paradox", PNAS, 118 (26) e2026808118: https://arxiv.org/abs/2106.11207 ► Our video "The Odds of Life and Intelligence": https://youtu.be/iLbbpRYRW5Y ► Our video "Why we might be alone in the universe": https://youtu.be/PqEmYU8Y_rI ::Music:: Music licensed by SoundStripe.com (SS) [shorturl.at/ptBHI], or via Creative Commons (CC) Attribution License (https://creativecommons.org/licenses/by/4.0/), or with permission from the artist ► Joachim Heinrich - Arrival ► Falls - Life in Binary ► Joachim Heinrich - Y ► Chris Zabriskie - Cylinder Two ► Chris Zabriskie - Cylinder Five ► Indive - Fusion ::Video clips:: ► The Thinker clip by Great Art Explained ► Tea sitirring clip by Chirag Kalelkar ► Cosmology simulation by ESO/L. Calçada/Microsoft WWT ► Sun videos by NASA/SDO ► TRAPPIST-1 animations by ESO/L. Calcada/spaceengine.org ► Roulette clip by steveh552 ► Galactic colonizat

Could we learn to "speak planet"? Computational linguistics is now found in your smart phone, car and speakers, making sense of our speech and text. Could these same algorithms make sense of exoplanets? Join us today as we explore a radical new research idea recently published by the Cool Worlds Lab. Written and Presented by Dr Emily Sandford. This research was made possible through funding from the Data Science Institute’s Seed Fund Award. → Support our research program: https://www.coolworldslab.com/support → Get Stash here! https://teespring.com/stores/cool-worlds-store THANK-YOU to our supporters T. Widdowson, D. Smith, M. Sloan, L. Sanborn, C. Bottaccini, D. Daughaday, A. Jones, S. Brownlee, Z. Star, T. Zanjonc, C. Wolfred, F. Rebolledo, L. Skov, E. Wilson, M. Elliott, B. Daniluk, J. Patrick-Saunders, M. Forbes, S. Vystoropskyi, S. Lee, Z. Danielson, C. Fitzgerald, V. Alexandrov, L. Macchia, C. Souter, M. Gillette, T. Jeffcoat, H. Jensen, F. Linker, J. Rockett, N. Fredrickson, B. Mlazgar, D. Holland, J. Alexander, E. Hanway, J. Molnar, D. Murphree, S. Hannum, T. Donkin, K. Myers, A. Schoen, K. Dabrowski, A. Critchley, A. DeRuiter, B. Sando, J. La Plante, M. Freydl, N. Popp, T. Gross, M. Nielsen, G. McLean, J. Black, P. Ainsworth & E. Moyle. ::Links:: ► Sandford, E., Kipping, D. & Collins, M. (2021), "On planetary systems as ordered sequences", MNRAS, 505, 2224: https://arxiv.org/abs/2105.09966 ► Brown et al. 1992, "Class-Based n-gram Models of Natural Language": https://www.aclweb.org/anthology/J92-4003.pdf ►McAllester 2018, "Information Theoretic Co-Training": https://arxiv.org/abs/1802.07572 ► Stratos 2019, "Mutual Information Maximization for Simple and Accurate Part-Of-Speech Induction": https://arxiv.org/abs/1804.07849 ::Music:: Music licensed via Creative Commons (CC) Attribution License (https://creativecommons.org/licenses/by/4.0/) ► Joachim Heinrich - Stjärna ► Indive - Trace Correction ::Video clips:: ► Exoplanet animations b

Visit our sponsor, Brilliant.org: https://brilliant.org/CoolWorlds. Astronomers are on a quest to search for life in the Universe. Two different pathways lay ahead for this hunt, biosignatures and technosignatures. Today, we discuss the arguments for and against each and consider that intelligence could be a far more persistent phenomenon that we might naively think - with important consequences for astronomers... Written and presented by Prof David Kipping of Columbia University → Support our research program: https://www.coolworldslab.com/support → Get Stash here! https://teespring.com/stores/cool-worlds-store THANK-YOU to our supporters T. Widdowson, D. Smith, M. Sloan, L. Sanborn, C. Bottaccini, D. Daughaday, A. Jones, S. Brownlee, Z. Star, T. Zanjonc, C. Wolfred, F. Rebolledo, L. Skov, E. Wilson, M. Elliott, B. Daniluk, J. Patrick-Saunders, M. Forbes, S. Vystoropskyi, S. Lee, Z. Danielson, C. Fitzgerald, V. Alexandrov, L. Macchia, C. Souter, M. Gillette, T. Jeffcoat, H. Jensen, F. Linker, J. Rockett, N. Fredrickson, B. Mlazgar, D. Holland, J. Alexander, E. Hanway, J. Molnar, D. Murphree, S. Hannum, T. Donkin, K. Myers, A. Schoen, K. Dabrowski, J. Black & R. Ramezankhani. ::Music:: Music licensed by SoundStripe.com (SS) [shorturl.at/ptBHI], or via Creative Commons (CC) Attribution License (https://creativecommons.org/licenses/by/4.0/), or with permission from the artist ► Joachim Heinrich - Stratosphere ► Brad Hill - A Slowly Lifting Fog [https://open.spotify.com/track/0GgkyL3y22kFslT6wUsKlt?si=35f82c623b9f486d] ► Chris - Cylinder Five ► Falls - Life in Binary ► Chris - Cylinder Five ► Falls - Ripley ► Chris - The Sun is Scheduled to Come Out Tomorrow ► Joachim Heinrich - Y ► Indive - Trace Correction ::Video clips:: ► Iceland footage by Louis Houiller ► Canada footage by Florian Nick/Arc'teryx ► Starry timelapse by Kuba Jurkowski ► Earth zoom-out by ESO/L. Calçada/M. Kornmesser ► Flask burning video by Science Skool ► Plankt

Visit our sponsor, MorningBrew at https://bit.ly/mbcoolworlds New research from the Cool Worlds Lab! Join us to learn about a new technique we've developed to search for exomoons - "Transit Origami". Written and presented by Prof David Kipping of Columbia University → Support our research program: https://www.coolworldslab.com/support → Get Stash here! https://teespring.com/stores/cool-worlds-store THANK-YOU to our supporters T. Widdowson, D. Smith, M. Sloan, L. Sanborn, C. Bottaccini, D. Daughaday, A. Jones, S. Brownlee, Z. Star, T. Zanjonc, C. Wolfred, F. Rebolledo, L. Skov, E. Wilson, M. Elliott, B. Daniluk, J. Patrick-Saunders, M. Forbes, S. Vystoropskyi, S. Lee, Z. Danielson, C. Fitzgerald, V. Alexandrov, L. Macchia, C. Souter, M. Gillette, T. Jeffcoat, H. Jensen, F. Linker, J. Rockett, N. Fredrickson, B. Mlazgar, D. Holland, J. Alexander, E. Hanway, J. Molnar, D. Murphree, S. Hannum, T. Donkin, K. Myers, A. Schoen, K. Dabrowski, J. Black & R. Ramezankhani, J. Armstrong, K. Weber, S. Marks, D. Kriha, H. Kruszynski, K. Bjärkefur, A. Koczan, M. Gaal, M. Zaenger & M. Samuels. ::Further Reading:: ► Kipping, D. (2021), "Transit Origami: A Method to Coherently Fold Exomoon Transits in Time Series Photometry", MNRAS, In Press: https://arxiv.org/abs/2108.02903 ► Kipping, D. (2020), "The exomoon corridor: Half of all exomoons exhibit TTV frequencies within a narrow window due to aliasing", MNRAS, 500, 1851: https://arxiv.org/abs/2012.00764 ::Music:: Music licensed by SoundStripe.com (SS) [shorturl.at/ptBHI], or via Creative Commons (CC) Attribution License (https://creativecommons.org/licenses/by/4.0/), or with permission from the artist ► Brad Hill - Searching [https://open.spotify.com/album/2oDAnUfX0OYYOnuIToAEcX] ► Joachim Heinrich - Stratosphere ► Falls - Life in Binary ► Joachim Heinrich - Cassiopeia ► Joachim Heinrich - Y ► Atlas - Waking Up ► Outro is by Tristan Armes - Orio [https://soundcloud.com/emergentmusic/sets/tristan-armes-h

Visit our sponsor, Brilliant.org: https://brilliant.org/CoolWorlds The cosmos is littered with blue and red stars... but curiously no green ones. Why? Is this a fundamental constraint or merely an unlikely outcome? And what would it mean for humanity if we ever did detect a green star? Join us today as we explore this simple question with major implications. Written & presented by Prof David Kipping → Support our research program: https://www.coolworldslab.com/support → Get Stash here! https://teespring.com/stores/cool-worlds-store THANK-YOU to our supporters D. Smith, M. Sloan, L. Sanborn, C. Bottaccini, D. Daughaday,A. Jones, S. Brownlee, G. Fulton, N. Kildal, M. Lijoi, Z. Star, E. West, T. Zanjonc, C. Wolfred, F. Rebolledo, L. Skov, E. Wilson, A. de Vaal, M. Elliott, B. Daniluk, M. Forbes, S. Vystoropskyi, S. Lee, Z. Danielson, C. Fitzgerald, V. Alexandrov, L. Macchia, C. Souter, M. Gillette, T. Jeffcoat, H. Jensen, F. Linker, J. Rockett, N. Fredrickson, B. Mlazgar, D. Holland, J. Alexander, E. Hanway, J. Molnar, D. Murphree, S. Hannum, T. Donkin, K. Myers, A. Schoen, K. Dabrowski, J. Black, R. Ramezankhani, J. Armstrong, K. Weber, S. Marks, L. Robinson, F. van Exter, S. Roulier, M. Hammer, J. Swigo & A. Murphy. ::Music:: Music licensed via Creative Commons (CC) Attribution License (https://creativecommons.org/licenses/by/4.0/) ► Brad Hill - Of Love and Loss [https://open.spotify.com/album/2oDAnUfX0OYYOnuIToAEcX] ► Joachim Heinrich - Cassiopeia ► Falls - Life in Binary ► Chris Zabriskie - Cylinder Five ► Falls - Ripley ► Indive - Trace Correction ::Film/TV clips used:: ► Contact (1997) - Warner Bros. Pictures ► Avengers: Endgame (2019) - Walt Disney Studios Motion Pictures ::Chapters:: 00:00 Prologue 00:59 The Dearth of Green Stars 05:25 Sponsorship 06:28 The Blackbody Approximation 10:51 Entering the Multiverse 13:04 The Viridian Flash 14:46 A Green Technosignature 18:37 Concluding Remarks 19:27 Outro and credits #NoG

Original Title: 50 Lost Earths