Summary
The podcast explores various interstellar propulsion technologies, ranking them based on speed and technological feasibility. The discussion begins with established methods like chemical rockets, which, despite their proven effectiveness, are limited in speed and efficiency. The nuclear thermal rocket is presented as a more efficient alternative, although it still requires chemical rockets for initial launch.
Innovative concepts such as nuclear pulse propulsion and solar sails are examined next. While nuclear pulse propulsion could theoretically provide significant thrust, its practical application is hindered by safety concerns and current treaties. Solar sails, powered by sunlight, face challenges in material construction but have been tested successfully. The conversation shifts to advanced ideas like laser sails, which could potentially reach 20% of the speed of light, making them a promising avenue for future exploration.
The podcast also touches on speculative technologies like the Alcubierre drive and antimatter propulsion, highlighting their theoretical potential but also their current impracticalities. Ultimately, the host emphasizes the importance of long-term thinking in space exploration, suggesting that humanity should consider missions that may take centuries to complete, as they could pave the way for future generations to explore distant worlds.
Show Notes
Use code coolworlds at https://incogni.com/coolworlds to get an exclusive 60% off an annual Incogni plan.Many of you wanted me to talk about the different interstellar propulsion ideas out there so we figured a fun way to compare them all would be in a tier list! Today we take a look at 14 different methods proposed to explore the stars. Let us know your rankings down below in the comments.Written & presented by Prof. David Kipping. Edited by Jorge Casas.→ Support our research: https://www.coolworldslab.com/support→ Get merch: https://teespring.com/stores/cool-worlds-store→ Check out our podcast: www.youtube.com/@CoolWorldsPodcastTHANK-YOU to T. Widdowson, D. Smith, L. Sanborn, C. Bottaccini, D. Daughaday, S. Brownlee, E. West, T. Zajonc, A. De Vaal, M. Elliott, B. Daniluk, S. Vystoropskyi, S. Lee, Z. Danielson, C. Fitzgerald, C. Souter, M. Gillette, T. Jeffcoat, J. Rockett, D. Murphree, M. Sanford, T. Donkin, A. Schoen, K. Dabrowski, R. Ramezankhani, J. Armstrong, S. Marks, B. Smith, J. Kruger, S. Applegate, E. Zahnle, N. Gebben, J. Bergman, C. Macdonald, M. Hedlund, P. Kaup, W. Evans, N. Corwin, K. Howard, L. Deacon, G. Metts, R. Provost, G. Fullwood, N. De Haan, R. Williams, E. Garland, R. Lovely, A. Cornejo, D. Compos, F. Demopoulos, G. Bylinsky, J. Werner, S. Thayer, T. Edris, F. Blood, M. O'Brien, D. Lee, J. Sargent, M. Czirr, F. Krotzer, I. Williams, J. Sattler, B. Reese, O. Shabtay, X. Yao, S. Saverys, A. Nimmerjahn, C. Seay, D. Johnson, L. Cunningham, M. Morrow, M. Campbell, B. Devermont, Y. Muheim, A. Stark, C. Caminero, P. Borisoff, A. Donovan, H. Schiff, J. Cos, J. Oliver, B. Kite, C. Hansen, J. Shamp, & R. Chaffee.REFERENCES► Kipping, D., 2024, "The Halo Drive: Fuel-Free Relativistic Propulsion of Large Masses via Recycled Boomerang Photons", JBIS: https://arxiv.org/abs/1903.03423MUSICLicensed by SoundStripe.com (SS) [shorturl.at/ptBHI], Artlist.io, via CC Attribution License (https://creativecommons.org/licenses/by/4.0/) or with permission from the artist.0:00 Tamuz Dekel - Quiet Pull2:55 Joachim Heinrich - Horizon4:17 Joachim Heinrich - Stjärna6:40 Hill - World of Wonder7:46 Chris Zabriskie - The Oceans Continue to Rise8:17 We Dream of Eden - Discovery9:48 Chris Zabriskie - The Oceans Continue to Rise11:11 Hill - Arctic Warmth13:50 Hill - Northern Boards17:25 Hill - Fragile21:02 Hill - The MeekCHAPTERS0:00 Intro1:33 Chemical Rockets3:31 Nuclear Thermal Rockets5:55 Nuclear Pulse8:20 Incogni9:48 Solar Sails12:15 Fission Sails13:05 Laser Sails14:47 Alcubierre Drive15:24 Wormholes16:09 Antimatter17:28 Mind Upload18:02 Negative Mass18:42 Halo Drive19:46 Ion Engine20:32 Bussard Ramjet21:03 Outro22:51 Credits#InterstellarPropulsion #TierList #CoolWorlds Learn more about your ad choices. Visit megaphone.fm/adchoices
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SpaceX's Starship rocket is nearing first orbital tests. This Super Heavy launch vehicle promises to lift enormous masses into space, and do so at far cheaper costs than the competitors. What could these capabilities do for astronomy though? Join us today as we explore the potential transformative power of Starship for astronomy.Written & presented by Prof David Kipping.→ Support our research program: https://www.coolworldslab.com/support→ Get merch here! https://teespring.com/stores/cool-worlds-storeTHANK-YOU to our supporters D. Smith, M. Sloan, C. Bottaccini, D. Daughaday, A. Jones, S. Brownlee, N. Kildal, Z. Star, E. West, T. Zajonc, C. Wolfred, L. Skov, G. Benson, A. De Vaal, M. Elliott, B. Daniluk, M. Forbes, S. Vystoropskyi, S. Lee, Z. Danielson, C. Fitzgerald, C. Souter, M. Gillette, T. Jeffcoat, H. Jensen, J. Rockett, N. Fredrickson, D. Holland, E. Hanway, 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, B. Smith, P. Masterson, R. Sievers, G. Canterbury, J. Kill, J. Cassese, J. Kruger, S. Way, P. Finch, S. Applegate, L. Watson, T. Wheeler, E. Zahnle, N. Gebben, J. Bergman, E. Dessoi, J. Alexander, C. Macdonald, M. Hedlund, P. Kaup, C. Hays, S. Krasner, W. Evans, D. Bansal, J. Curtin, J. Sturm, RAND Corp., I. Attard, M. Donovan, N. Corwin & M. Mangione.::References::► House Science, Space, and Technology Committee video: https://science.house.gov/hearings/keeping-our-sights-on-mars-part-3-a-status-update-and-review-of-nasas-artemis-initiative► Starship Update by SpaceX: https://youtu.be/3N7L8Xhkzqo::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► Hill - There is But One Good [https://open.spotify.com/album/4pmiXcyRpPlFjWjb45pYLx]► Hill - Arc [https://open.spotify.com/album/4pmiXcyRpPlFjWjb45pYLx]► Chris Zabriskie - Cylinder 2► Falls - Life in Binary► Chris Zabriskie - The Sun is Scheduled to Come Out Tomorrow► Atlas - Waking Up::Film/TV clips used::► Interstellar (2014) Paramount Pictures::Chapters::00:00 Prologue00:48 Space Telescopes05:10 Starship Background07:38 Bigger is Better10:42 What Makes Starship Different16:32 Astronomy Benefits21:41 Risk22:46 Outro and Credits#SpaceX #Starship #CoolWorlds Learn more about your ad choices. Visit megaphone.fm/adchoices
Go to our sponsor https://betterhelp.com/coolworlds for 10% off your first month of therapy with BetterHelp and get matched with a therapist who will listen and help.Direct Air Capture (DAC) has been getting more and more attention over the last few years. Could we avert climate change by pulling carbon dioxide out of the atmosphere? Could we not just stop, but actually *reverse* the damage done? Unfortunately, most don't fully appreciate just quite how much CO2 we've emitted and the outrageous scale of the problem facing us. Today, we apply the fundamental principles of thermodynamics to question whether this is even feasible.Written & presented by Prof. David Kipping. Edited by Jorge Casas. Fact checking by Alexandra Masegian.→ Support our research: https://www.coolworldslab.com/support→ Get merch: https://teespring.com/stores/cool-worlds-store→ Check out our podcast: www.youtube.com/@CoolWorldsPodcastTHANK-YOU to D. Smith, M. Sloan, L. Sanborn, C. Bottaccini, D. Daughaday, A. Jones, S. Brownlee, N. Kildal, Z. Star, E. West, T. Zajonc, C. Wolfred, L. Skov, G. Benson, A. De Vaal, M. Elliott, B. Daniluk, M. Forbes, S. Vystoropskyi, S. Lee, Z. Danielson, C. Fitzgerald, C. Souter, M. Gillette, T. Jeffcoat, J. Rockett, D. Murphree, T. Donkin, K. Myers, A. Schoen, K. Dabrowski, J. Black, R. Ramezankhani, J. Armstrong, K. Weber, S. Marks, L. Robinson, S. Roulier, B. Smith, J. Cassese, J. Kruger, S. Way, P. Finch, S. Applegate, L. Watson, E. Zahnle, N. Gebben, J. Bergman, E. Dessoi, C. Macdonald, M. Hedlund, P. Kaup, C. Hays, W. Evans, D. Bansal, J. Curtin, J. Sturm, RAND Corp., M. Donovan, N. Corwin, M. Mangione, K. Howard, L. Deacon, G. Metts, G. Genova, R. Provost, B. Sigurjonsson, G. Fullwood, B. Walford, J. Boyd, N. De Haan, J. Gillmer, R. Williams, E. Garland, A. Leishman, A. Phan Le, R. Lovely, M. Spoto, A. Steele, M. Varenka, K. Yarbrough, A. Cornejo, D. Compos, F. Demopoulos, G. Bylinsky, J. Werner, B. Pearson, S. Thayer, T. Edris, A. Harrison, B. Seeley, F. Blood, M. O'Brien, P. Muzyka, E. Loomans, D. Lee, J. Sargent, M. Czirr, F. Krotzer, I. Williams, J. Sattler, & J. Smallbon.REFERENCES► House, K. Z. et al. 2011, "Economic and energetic analysis of capturing CO2 from ambient air", Proc. Nat. Acad. Sci., 108(51), 20428-33: https://pubmed.ncbi.nlm.nih.gov/22143760/► Lackner, K. S. 2013, "The thermodynamics of direct air capture of carbon dioxide", Energy, 50, 38: https://www.sciencedirect.com/science/article/pii/S0360544212006901► Long-Innes, R. & Struchtrup, H. 2022, "Thermodynamic loss analysis of a liquid- sorbent direct air carbon capture plant", Cell Reports Physical Science, 3, 100791: https://www.sciencedirect.com/science/article/pii/S2666386422000583► Ozkan, M. et al., 2022, "Current status and pillars of direct air capture technologies", iScience, 25, 103990: https://www.sciencedirect.com/science/article/pii/S2589004222002607► Sanz-Perez E. S. et al., 2016, "Direct Capture of CO2 from Ambient Air", Chem. Rev., 116, 11840: https://pubs.acs.org/doi/10.1021/acs.chemrev.6b00173MUSICLicensed by SoundStripe.com (SS) [shorturl.at/ptBHI], Artlist.io, via CC Attribution License (https://creativecommons.org/licenses/by/4.0/) or with permission from the artist.► Hill - A Slowly Lifting Fog [0:00]► Falls - Life in Binary [3:24] ► Hill - Northern Boards [8:03]► Hill - To Quiet the Drumming Inside My Head [11:13]► Hill - Chasing out the Chaos [15:29]► Chris Zabriskie - Cylinder Seven [19:23] ► Joachim Heinrich - Y [22:53]CHAPTERS0:00 Climate Change2:44 Removal Requirements3:38 Possible Solutions5:03 Introducing DAC5:43 Climate Anxiety7:12 DAC Principles8:14 Scalability9:29 Thermodynamics12:08 Progressive DAC13:32 RCPs15:09 Simulations17:03 Energy Requirements19:34 Efficiency21:21 Conclusions24:35 Outro and credits#DirectAirCapture #ClimateChange #NetZero Learn more about your ad choices. Visit megaphone.fm/adchoices
Get a 7-day free trial and 25% off Blinkist Annual Premium by clicking here: https://www.blinkist.com/coolworldslabA faster-than-light (FTL) warp drive would arguably represent the most important invention of all time. In 1994, Miguel Alcubierre gave all of us hope as he found a solution within general relativity that would cause the necessary warping of space. But after nearly 30 years of further study, what does our current understanding of physics say about the feasibility of a warp drive?Written & presented by Prof. David Kipping. Thanks to Bobrick Martire for clarifications and to John Michael Godier and team for audio from their interview with Alcubierre (https://youtu.be/JafY92PhgKU). Thumbnail image by Zamanday Yolculugunu (www.zamandayolculuk.com)→ Support our research: https://www.coolworldslab.com/support→ Get merch: https://teespring.com/stores/cool-worlds-store→ Check out our podcast: www.youtube.com/@CoolWorldsPodcastTHANK-YOU to D. Smith, M. Sloan, L. Sanborn, C. Bottaccini, D. Daughaday, A. Jones, S. Brownlee, N. Kildal, Z. Star, E. West, T. Zajonc, C. Wolfred, L. Skov, G. Benson, A. De Vaal, M. Elliott, B. Daniluk, M. Forbes, S. Vystoropskyi, S. Lee, Z. Danielson, C. Fitzgerald, C. Souter, M. Gillette, T. Jeffcoat, J. Rockett, D. Murphree, T. Donkin, K. Myers, A. Schoen, K. Dabrowski, J. Black, R. Ramezankhani, J. Armstrong, K. Weber, S. Marks, L. Robinson, S. Roulier, B. Smith, J. Cassese, J. Kruger, S. Way, P. Finch, S. Applegate, L. Watson, E. Zahnle, N. Gebben, J. Bergman, E. Dessoi, C. Macdonald, M. Hedlund, P. Kaup, C. Hays, W. Evans, D. Bansal, J. Curtin, J. Sturm, RAND Corp., M. Donovan, N. Corwin, M. Mangione, K. Howard, L. Deacon, G. Metts, G. Genova, R. Provost, B. Sigurjonsson, G. Fullwood, B. Walford, J. Boyd, N. De Haan, J. Gillmer, R. Williams, E. Garland, A. Leishman, A. Phan Le, R. Lovely, M. Spoto, A. Steele, M. Varenka, K. Yarbrough, A. Cornejo, D. Compos, F. Demopoulos, G. Bylinsky, J. Werner, B. Pearson, S. Thayer, T. Edris, A. Harrison, B. Seeley, F. Blood, M. O'Brien, P. Muzyka, E. Loomans, D. Lee, J. Sargent, M. Czirr, F. Krotzer, I. Williams & J. Sattler.REFERENCES► Alcubierre 1994, Class. Quant. Grav. 11, L73 https://arxiv.org/abs/gr-qc/0009013► Everett 1996, Phys. Rev. D 53, 7365 https://journals.aps.org/prd/abstract/10.1103/PhysRevD.53.7365► Krasnikov 1998, Phys. Rev. D 57, 4760 https://arxiv.org/abs/gr-qc/9511068► Pfenning & Ford 1998, Phys. Rev. D 57, 3489 https://arxiv.org/abs/gr-qc/9710055► Van Den Broeck 1999, Class. Quant. Grav. 16, 3973 https://arxiv.org/abs/gr-qc/9905084► Bobrick & Martire 2021, Class. Quant. Grav. 38, 22 https://arxiv.org/abs/2102.06824► Fell & Heisenberg 2021, Class. Quant. Grav. 38, 16 https://arxiv.org/abs/2104.06488► Lentz 2021, Class. Quant. Grav. 38, 14 https://iopscience.iop.org/article/10.1088/1361-6382/abe692► Santiago et al. 2022, Phys. Rev. D 105, 064038 https://arxiv.org/abs/2105.03079► McMonigal et al. 2012, Phys. Rev. D 85, 064024 https://arxiv.org/abs/1202.5708► Finazzi et al. 2009, Phys. Rev. D 79, 124017 https://arxiv.org/abs/0904.0141► Coule 1998, Class. Quant. Grav. 15, 2523 https://iopscience.iop.org/article/10.1088/0264-9381/15/8/026► Van Den Broeck 1999, arXiv https://arxiv.org/abs/gr-qc/9906050► Gast 2021, Scientific American www.scientificamerican.com/article/star-treks-warp-drive-leads-to-new-physics/► Hawking 1992, Phys. Rev. D 46, 603 https://journals.aps.org/prd/abstract/10.1103/PhysRevD.46.603► Alcubierre & Lobo 2017, Wormholes, Warp Drives and Energy Conditions, Fundam. Theor. Phys. 189, 257 https://arxiv.org/abs/2103.05610MUSICLicensed by SoundStripe.com (SS) [shorturl.at/ptBHI], Artlist.io, via CC Attribution License (https://creativecommons.org/licenses/by/4.0/) or with permission from the artist.► 0:00 Sid Acharya - Searching for Answers► 3:18 Falls - Life in Binary► 5:01 Hill - There is but Learn more about your ad choices. Visit megaphone.fm/adchoices
Sponsored by Perplexity! This is truly a game-changer – Perplexity Computer built this insane tool in only one prompt! Check out my tool and build your own today: https://pplx.ai/cool-worlds-youtube-1Today's video explores the most terrifying calculation I've ever done, one that comes with some deeply unsettling implications for the Universe in which we live...Written & presented by David Kipping, edited by Jorge Casas→ Support our research: https://www.coolworldslab.com/support→ Get merch: https://crowdmade.com/collections/cool-worlds→ Check out our podcast: www.youtube.com/@CoolWorldsPodcastTHANK-YOU to S. Shardool, M. Seay, M. McMillan, M. Popovski, M. Singh, M. Elliott, M. Donkin, M. Zajonc, M. Czirr, M. Williams, M. Daughaday, M. Muriuki, M. Cartmell, M. Ford, M. Devermont, M. Hedlund, M. Patterson, M. Murphy, M. Bassnett, M. Lovely, M. Schiff, M. Bylinsky, C. Fitzgerald, M. Danielson, M. Morrow, M. Corwin, M. Schreiner, M. Metts, M. Stevenson, M. Vystoropskyi, M. Brownlee, M. Shamp, M. Sattler, M. Ross-Lee, M. Bueche, M. Fitzsimmons, M. Borisoff, M. Larter, M. Cunningham, M. Williams, M. Alley, M. Adler, M. Murray, L. Deacon, M. Kruger, M. Bryant, M. Lee, P. Johnston, M. Sanford, N. Offor, M. Saint, R. Borbidge, M. Reese, M. Langley, M. Howard, M. Stewart, M. Morrison, M. Kennedy, M. Aron, M. Rockett, M. Kingston, M. Daniluk, M. Schoen, M. Lee, M. Huch, M. Chaffee, M. Simmons, M. Herman, M. Vaal, M. Canning, M. Kochkov, M. Fullwood, G. Belsak, M. Bergman, M. Armstrong, M. Bottaccini, M. Farabee, B. Gaalen, M. Haan, M. Hoffman, E. Garland, M. Everest, M. Venzor, M. Frederick, M. Peraza, W. Ruf, M. Matters, M. Smith, M. Hansen, M. Edris, M. Souter, M. Smith, M. OBrien, M. Provost & M. Nimmerjahn.REFERENCES► Kipping, D. (2026), "The Cosmological Hart-Tipler Conjecture": https://arxiv.org/abs/2606.04044► Hart, M. (1975), "Explanation for the Absence of Extraterrestrials on Earth": https://ui.adsabs.harvard.edu/abs/1975QJRAS..16..128H► Tipler, F. (1980), "Extraterrestrial intelligent beings do not exist": https://ui.adsabs.harvard.edu/abs/1980QJRAS..21..267T► Olson, S. J. (2015), "Homogeneous cosmology with aggressively expanding civilizations": https://ui.adsabs.harvard.edu/abs/2015CQGra..32u5025O► Armstrong & Sandberg (2013), "Eternity in six hours: Intergalactic spreading of intelligent life and sharpening the Fermi paradox": https://ui.adsabs.harvard.edu/abs/2013AcAau..89....1► Forgan, D. (2019), "Predator-prey behaviour in self-replicating interstellar probes": https://ui.adsabs.harvard.edu/abs/2019IJAsB..18..552F► von Neumann, J. (1966) "Theory of Self-Reproducing Automata": https://cba.mit.edu/events/03.11.ASE/docs/VonNeumann.pdf► Ellery, A. (2022), "Self-replicating probes are imminent ─ implications for SETI": https://ui.adsabs.harvard.edu/abs/2022IJAsB..21..212E► Borgue & Hein (2021), "Near-term self-replicating probes - A concept design": https://ui.adsabs.harvard.edu/abs/2021AcAau.187..546BMUSICLicensed by SoundStripe.com (SS) [shorturl.at/ptBHI], Artlist.io, via CC Attribution License (https://creativecommons.org/licenses/by/4.0/) or with permission from the artist. You can see all of our past music here: https://open.spotify.com/playlist/0Bu2UQlKDb0KaeliLZUOZn► Amnesia OST - Ending Agrippa► Scott Buckley - Dragon’s Lullabye► Chris Zabriskie - Cylinder Four► Hill - It Wasn’t Mine to Begin With► Hill - World of Wonder► Hill - Don’t Think► Chris Zabriskie - Cylinder Two#FermiParadox #Aliens #CoolWorlds Learn more about your ad choices. Visit megaphone.fm/adchoices
The Cool Worlds Lab is trying to find the first exomoon, a moon around a planet outside the Solar System. But, exomoons have been eluding us for a few years now. So why are they so hard to find and what do we know so far? Get up to date with the latest limits and prospects for detection. You can find the latest paper on constraints on exomoons at ::More about this Video::► Hunt for Exomoons with Kepler (HEK) Project website: www.exomoon.org► HEK Project Twitter feed https://twitter.com/hek_project► Kipping et al. (2012), "The Hunt for Exomoons with Kepler (HEK): I. Description of a New Observational Project": https://arxiv.org/abs/1201.0752► Kipping et al. (2013a), "The Hunt for Exomoons with Kepler (HEK): II. Analysis of Seven Viable Satellite-Hosting Planet Candidates": https://arxiv.org/abs/1301.1853► Kipping et al. (2013b), "The Hunt for Exomoons with Kepler (HEK): III. The First Search for an Exomoon around a Habitable-Zone Planet": https://arxiv.org/abs/1306.1530► Kipping et al. (2014), "The Hunt for Exomoons with Kepler (HEK): IV. A Search for Moons around Eight M-Dwarfs" https://arxiv.org/abs/1401.1210► Kipping et al. (2015), "The Hunt for Exomoons with Kepler (HEK): V. A Survey of 41 Planetary Candidates for Exomoons": https://arxiv.org/abs/1503.05555::Playlists For Channel::Latest Cool Worlds Videos ► http://bit.ly/NewCoolWorldsCool Worlds Research ► http://bit.ly/CoolWorldsResearchGuest Videos ► http://bit.ly/CoolWorldsGuestsQ&A Videos ► http://bit.ly/CoolWorldsQAScience of TV/Film ► http://bit.ly/ScienceMovies::Follow us::SUBSCRIBE to the channel http://bit.ly/CoolWorldsSubscribeCool Worlds Lab http://coolworlds.astro.columbia.eduTwitter https://twitter.com/david_kippingInstagram https://www.instagram.com/cool.worldsTHANKS FOR WATCHING!! Learn more about your ad choices. Visit megaphone.fm/adchoices