Cool Worlds

Proxima Centauri is our nearest star but we still don't know whether it has any planets. Prof Kipping discusses our planet hunting campaign using the space telescope MOST and gives you the latest news.

::More about this Video::

► Gillon et al. (2016), "Temperate Earth-sized planets transiting a nearby ultracool dwarf star": http://www.nature.com/nature/journal/vaop/ncurrent/full/nature17448.html
► Muirhead at al. (2012), "Characterizing the Cool KOIs III. KOI-961: A Small Star with Large Proper Motion and Three Small Planets": http://arxiv.org/abs/1201.2189
► MOST telescope homepage: http://most.astro.ubc.ca
► Outro music by Taylor Davis: https://www.youtube.com/watch?v=dl9kI1yQKZk

::Playlists For Channel::

Latest Cool Worlds Videos ► http://bit.ly/NewCoolWorlds
Cool Worlds Research ► http://bit.ly/CoolWorldsResearch
Guest Videos ► http://bit.ly/CoolWorldsGuests
Q&A Videos ► http://bit.ly/CoolWorldsQA
Science of TV/Film ► http://bit.ly/ScienceMovies

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SUBSCRIBE to the channel http://bit.ly/CoolWorldsSubscribe
Cool Worlds Lab http://coolworlds.astro.columbia.edu
Twitter https://twitter.com/david_kipping
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Déjà vu? Professor Avi Loeb has sparked controversy by suggesting - again - that a recently detected interstellar body passing through the Solar System (3I/ATLAS) could be an alien spacecraft. Today, we dive into what he his claiming and whether it holds up - just the science.

Written & presented by Prof. David Kipping, edited by Jorge Casas. Special thanks to Jason Wright for fact checking.

→ Support our research: https://www.coolworldslab.com/support
→ Get merch: https://crowdmade.com/collections/cool-worlds
→ Check out our podcast: www.youtube.com/@CoolWorldsPodcast

THANK-YOU to D. Smith, 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, J. Rockett, M. Sanford, T. Donkin, A. Schoen, K. Dabrowski, J. Armstrong, B. Smith, J. Bergman, C. Macdonald, M. Hedlund, N. Corwin, K. Howard, G. Metts, R. Provost, G. Fullwood, N. De Haan, R. Williams, E. Garland, R. Lovely, D. Compos, F. Demopoulos, T. Edris, M. O'Brien, D. Lee, M. Czirr, I. Williams, B. Reese, A. Nimmerjahn, C. Seay, D. Johnson, L. Cunningham, M. Morrow, M. Campbell, B. Devermont, P. Borisoff, H. Schiff, J. Cos, C. Hansen, R. Chaffee, A. Ortiz, B. McMillan, B. Cartmell, J. Bryant, J. Obioma, M. Zeiler, S. Murray, S. Patterson, C. Kennedy, G. Le Saint, W. Ruf, A. Kochkov, B. Langley, P. Stevenson, T. Ford, A. Laroye, I. Venzor, R. Raszka, B. Gaalen, J. Alley, D. Aron, G. Thomsen, S. Shardool, A. Phan Le, N. Offor, A. Huch, J. Morrison, C. Fitzsimmons, W. Smith, A. Twyman, B. Burgess, B. Bueche, D. Hoffman & J. Murph.

REFERENCES
► Avi Loeb's blog: https://avi-loeb.medium.com
► Hibberd, Crowl & Loeb 2025, "Is the Interstellar Object 3I/ATLAS Alien Technology?": https://arxiv.org/abs/2507.12213
► Loeb 2018, "Six Strange Facts About`Oumuamua": https://arxiv.org/abs/1811.08832
► Amrhein et al. 2019, "Scientists rise up against statistical significance", Nature, 567, 305-307: https://www.nature.com/articles/d41586-019-00857-9
► Tonry et al. 2018: "ATLAS: A High-Cadence All-Sky Survey System", PASP, 130, 064505: https://arxiv.org/abs/1802.00879
► Loeb, Hibberd & Crowl 2025: "Intercepting 3I/ATLAS at Closest Approach to Jupiter with the Juno spacecraft": https://arxiv.org/abs/2507.21402
► Loeb & MacLeod 2024, "Interstellar meteors from the tidal disruption of rocky planets
on eccentric orbits around M dwarfs", A&A, 686, A123: https://arxiv.org/abs/2310.09399
► Hopkins et al. 2025, "From a Different Star: 3I/ATLAS in the context of the Ōtautahi-Oxford interstellar object population model", ApJL accepted: https://arxiv.org/abs/2507.05318
► Belyakov et al. 2025, "Palomar and Apache Point Spectrophotometry of Interstellar Comet 3I/Atlas", RNAAS, 9, 149: https://arxiv.org/abs/2507.11720
► Jewitt et al. 2025, "Hubble Space Telescope Observations of the Interstellar Interloper 3I/ATLAS": https://arxiv.org/abs/2508.02934
► Dorman et al. 2013, "The Spatial Distribution of C2, C3 and NH in Comet 2P/Encke", ApJ, 778, 140: https://iopscience.iop.org/article/10.1088/0004-637X/778/2/140/pdf

MUSIC
Licensed 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 Chris Zabriskie - Cylinder Two
3:38 Chris Zabriskie - Cylinder Three
6:01 Triad - Reverence
7:37 Chris Zabriskie - Cylinder Four
10:30 Jeremy Soule - Silent Footsteps
13:15 Jeremy Soule - Dragonsreach
15:40 Jeremy Soule - Under the Ancient Sun
18:47 Chris Zabriskie - Cylinder Five
20:46 Hill - The Meek

CHAPTERS
0:00 Intro
4:35 Trajectory
6:04 Incogni
7:37 Close Encounters
10:50 Speed
13:24 Size
23:38 Outro

#CoolWorlds #3IATLAS #Interstellar

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New research from the Cool Worlds Lab leads a shocking conclusion - most stars might be incapable of developing intelligent life....

Written & presented by Prof. David Kipping, edited by Jorge Casas. Thumbnail by Pablo Carlos Budassi https://pablocarlosbudassi.com

→ Support our research: https://www.coolworldslab.com/support
→ Get merch: https://crowdmade.com/collections/cool-worlds
→ Check out our podcast: www.youtube.com/@CoolWorldsPodcast

PAPER: https://arxiv.org/abs/2510.01215

THANK-YOU to D. Smith, 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, J. Rockett, M. Sanford, T. Donkin, A. Schoen, K. Dabrowski, J. Armstrong, B. Smith, J. Bergman, C. Macdonald, M. Hedlund, N. Corwin, K. Howard, G. Metts, R. Provost, G. Fullwood, N. De Haan, R. Williams, E. Garland, R. Lovely, D. Compos, F. Demopoulos, T. Edris, M. O'Brien, D. Lee, M. Czirr, I. Williams, B. Reese, A. Nimmerjahn, C. Seay, D. Johnson, L. Cunningham, M. Morrow, M. Campbell, B. Devermont, P. Borisoff, H. Schiff, J. Cos, C. Hansen, R. Chaffee, A. Ortiz, B. McMillan, B. Cartmell, J. Bryant, J. Obioma, M. Zeiler, S. Murray, S. Patterson, C. Kennedy, G. Le Saint, W. Ruf, A. Kochkov, B. Langley, P. Stevenson, T. Ford, A. Laroye, I. Venzor, R. Raszka, B. Gaalen, J. Alley, D. Aron, G. Thomsen, S. Shardool, A. Phan Le, N. Offor, A. Huch, J. Morrison, C. Fitzsimmons, W. Smith, A. Twyman, B. Burgess, B. Bueche, D. Hoffman, J. Murphy, J. Matters, R. Borbidge, A. Singh, S. Larter & M. Adler.

MUSIC
Licensed 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 Ending: Agrippa - Mikko Tarmia
2:41 Atlas - Waking Up
3:20 Hill - World of Wonder
5:11 Atlas - Waking Up
7:35 Hill - Fragile Beings
10:46 Hill - A Flickering Start
13:50 Hill - A Thin Place
18:51 Hill - Kingdom of the Skies

CHAPTERS
0:00 Two Existential Puzzles
3:20 Incogni
5:11 Possible Explanations
7:05 Bayesian Modeling
9:50 Results
12:05 No Luck
13:52 Interpretation
15:17 Lies & Statistics
18:11 Final Thoughts
20:09 Outro + Credits

#CoolWorlds #AlienLife #Sun

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To celebrate the release of Star Wars Rogue One this weekend, let's ask the question - could we detect the Death Star with our current telescopes? Remarkably astronomers have been thinking about the detectability of alien megastructures, such as the Death Star, for many years and we can apply some scientific thinking to get to the answer.

::More about this Video::

► Companion video on Martin Archer's channel, "Is the Death Star a Star?": https://youtu.be/Q4CKSekJzxk
► Kipping & Teachey 2016, "A Cloaking Device for Transiting Planets": https://arxiv.org/abs/1603.08928
► Cool Worlds video by Alex Teachey about our laser cloaking system: https://www.youtube.com/watch?v=z1Pqqf_6J9w
► Most recent results from exomoon hunting, 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
► Cool Worlds video update on the search for exomoons: https://www.youtube.com/watch?v=S3VQ0PdoR3M
► Freeman Dyson's original paper on Dyson Spheres, "Search for Artificial Stellar Sources of Infrared Radiation": http://science.sciencemag.org/content/131/3414/1667
► Cool Worlds video explaining "What is an Alien Megastructure?": https://www.youtube.com/watch?v=tYHVCW3BkHU

::Playlists For Channel::

Latest Cool Worlds Videos ► http://bit.ly/NewCoolWorlds
Cool Worlds Research ► http://bit.ly/CoolWorldsResearch
Guest Videos ► http://bit.ly/CoolWorldsGuests
Q&A Videos ► http://bit.ly/CoolWorldsQA
Science of TV/Film ► http://bit.ly/ScienceMovies

::Follow us::

SUBSCRIBE to the channel http://bit.ly/CoolWorldsSubscribe
Cool Worlds Lab http://coolworlds.astro.columbia.edu
Twitter https://twitter.com/david_kipping
Instagram https://www.instagram.com/cool.worlds

THANKS FOR WATCHING!!

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Space is a bleak, hostile environment. Asteroid strikes, supernovae and gamma ray bursts could wipe us out at any moment. But could certain parts of the galaxy be more dangerous than others? And could this explain why we live, when and where we live?

Written and presented by Prof David Kipping, guest starring Jackson Kipping and edited by Jorge Casas.

→ 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, 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, S. Hannum, T. Donkin, K. Myers, A. Schoen, K. Dabrowski, J. Black, R. Ramezankhani, J. Armstrong, K. Weber, S. Marks, L. Robinson, S. Roulier, B. Smith, G. Canterbury, J. Cassese, J. Kruger, S. Way, P. Finch, S. Applegate, L. Watson, E. Zahnle, N. Gebben, J. Bergman, E. Dessoi, J. Alexander, 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.

::Music::
Music licensed by SoundStripe.com (SS) [shorturl.at/ptBHI], Artlist.io, via Creative Commons (CC) Attribution License (https://creativecommons.org/licenses/by/4.0/), or with permission from the artist

::References::
► Spinelli & Ghirlanda, 2023, The Impact of GRBs on Exoplanetary Habitability, Universe, 9, 60: https://www.mdpi.com/2218-1997/9/2/60
► Gehrels et al., 2003, Ozone Depletion from Nearby Supernovae, ApJ, 585, 1169: https://arxiv.org/abs/astro-ph/0211361
► Thomas et al., 2006, Gamma-ray bursts and terrestrial planetary atmospheres, New. J. Phys., 8, 120: https://iopscience.iop.org/article/10.1088/1367-2630/8/7/120
► Fisher & Valenti, 2005, The Planet-Metallicity Correlation, ApJ, 622, 1102: https://iopscience.iop.org/article/10.1086/428383
► Buchhave & Latham, 2005, The Metallicities of Stars with and without Transiting Planets, ApJ, 808, 4: https://arxiv.org/abs/1507.03557
► Wang & Fisher, 2005, Revealing A Universal Planet-Metallicity Correlation For Planets of Different Sizes Around Solar-Type Stars, AJ, 149, 7: https://arxiv.org/abs/1310.7830

::Music::
► Chris Zabriskie - Music from Neptune Flux 0:00
► Falls - Ripley 6:06
► Chris Zabriskie - Music from Neptune Flux 9:32
► Brad Hill - A Slowly Lifting Fog 13:53
► Joachim Heinrich - Y 16:58

::Chapters::
00:00 Introduction
02:28 Galactic Habitable Zone
05:09 Supernovae
10:26 GRBs
15:31 Multi-Threats
16:43 Planet formation
18:53 Planet retention
20:11 The Final Picture
22:56 Outro & Credits

#GalacticHabitableZone #Supernovae #GammaRayBursts

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In 1855, Captain William Stephen Jacob authored a paper in the Monthly Notices of the Royal Astronomical Society claiming that a planet likely existed in the binary star system 70 Ophiuchi. Although his claim ended being wrong, it's pretty remarkable that someone was even thinking about doing this with scientific methods at the time! Here we get into Jacob's claim, what went wrong, and what legacy this has left us with.

::More about this Video::

► Captain William S Jacob, "On Certain Anomalies Presented by the Binary Star 70 Ophiuchi": http://adsabs.harvard.edu/abs/1855MNRAS..15..228J
► Information compiled about Captain William Stephen Jacob and family by his living descendant, Kenneth Jacob: http://www.myjacobfamily.com/favershamjacobs/williamstephenjacob.htm
► Thomas See, "Researches on the orbit of 70 Ophiuchi, and on a periodic perturbation in the motion of the system arising from the action of an unseen body": http://adsabs.harvard.edu/abs/1896AJ.....16...17S
► Forest Ray Moulton, "The limits of temporary stability of satellite motion, with an application to the question of the existence of an unseen body in the binary system 70 Ophiuchi": http://adsabs.harvard.edu/abs/1899AJ.....20...33M
► Outro music by Taylor Davis: https://www.youtube.com/watch?v=dl9kI1yQKZk

::Playlists For Channel::

Latest Cool Worlds Videos ► http://bit.ly/NewCoolWorlds
Cool Worlds Research ► http://bit.ly/CoolWorldsResearch
Guest Videos ► http://bit.ly/CoolWorldsGuests
Q&A Videos ► http://bit.ly/CoolWorldsQA
Science of TV/Film ► http://bit.ly/ScienceMovies

::Follow us::

SUBSCRIBE to the channel http://bit.ly/CoolWorldsSubscribe
Cool Worlds Lab http://coolworlds.astro.columbia.edu
Twitter https://twitter.com/david_kipping
Instagram https://www.instagram.com/cool.worlds

THANKS FOR WATCHING!!

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In the last few years, astronomers have witnessed a growing problem emerge. As measurement precision has increased, the hope was that this problem would abate, but instead it has only exacerbated. Welcome to "The Crisis in Cosmology". But what exactly is the fuss all about, and how much should be believe the sensationalism?

Written and presented by Prof David Kipping, edited by Jorge Casas.

→ 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, 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, S. Vystoropskyi, S. Lee, Z. Danielson, C. Fitzgerald, C. Souter, M. Gillette, T. Jeffcoat, J. Rockett, D. Murphree, S. Hannum, T. Donkin, K. Myers, A. Schoen, K. Dabrowski, J. Black, R. Ramezankhani, J. Armstrong, K. Weber, S. Marks, L. Robinson, S. Roulier, B. Smith, G. Canterbury, J. Cassese, J. Kruger, S. Way, P. Finch, S. Applegate, L. Watson, E. Zahnle, N. Gebben, J. Bergman, E. Dessoi, J. Alexander, 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.

::Music::
Music licensed by SoundStripe.com (SS) [shorturl.at/ptBHI], Artlist.io, via Creative Commons (CC) Attribution License (https://creativecommons.org/licenses/by/4.0/), or with permission from the artist
► 00:00 Sid Acharya - Sky Sailing
► 01:01 Chris Zabriskie - Cylinder Four
► 03:25 Hill - Loneliness [https://open.spotify.com/album/6vasPO2FKG0ddtkOiHmqBC?si=qWxcwquXSiaSXAeHFG6OMw]
► 06:35 Chris Zabriskie - Cylinder Five
► 09:19 Hill - Detached [https://open.spotify.com/album/2RsyjpeBo63MBse1PL2HNr?si=gBFBSqYKQmK-yPJjBE7Udw]
► 12:53 Hill - There Is but One Good [https://open.spotify.com/album/4pmiXcyRpPlFjWjb45pYLx?highlight=spotify:track:1vlxAsmQaHJo1HyvYJF770]
► 19:08 Chris Zabriskie - Stories About the World That Once Was
► 21:49 Joachim Heinrich - Y
► 24:05 Indive - Halo Drive

::Chapters::
00:00 Introduction
01:16 Hubble's Constant
02:24 Using the CMB
04:34 The Local Universe
06:20 Cepheids
08:24 The Distance Ladder
10:38 The Hubble Tension
11:29 New Physics?
12:50 The Trouble with Cepheids
15:50 Red Giant Saviors
20:17 Giant Headaches
21:04 No Crisis?
22:37 Sensationalism
24:05 Outro and credits

#CrisisInCosmology #HubbleTension #JWST

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We caught up with Prof Sean Carroll at a recent astronomy conference and got his thoughts about time. Time may seem like a fundamental property of the Universe, but actually there's nothing in quantum theory which requires this to be so. Prof Carroll explains how time being merely an illusion, an emergent property rather than a fundamental one, is actually compatible with our best understanding of nature. This is one of two videos we shot with Sean so look out for the second video later in the year!

::More about this Video::

► Sean Carroll: "From Eternity to Here" book available on Amazon: https://www.amazon.com/Eternity-Here-Quest-Ultimate-Theory/dp/0452296544
► Sean Carroll's blog "Preposterous Universe" at https://www.preposterousuniverse.com/blog/
► 229th Meeting of the American Astronomical Society: https://aas.org/meetings/aas229
► Background music by Hans Zimmer, Interstellar OST

::Playlists For Channel::

Latest Cool Worlds Videos ► http://bit.ly/NewCoolWorlds
Cool Worlds Research ► http://bit.ly/CoolWorldsResearch
Guest Videos ► http://bit.ly/CoolWorldsGuests
Q&A Videos ► http://bit.ly/CoolWorldsQA
Science of TV/Film ► http://bit.ly/ScienceMovies

::Follow us::

SUBSCRIBE to the channel http://bit.ly/CoolWorldsSubscribe
Cool Worlds Lab http://coolworlds.astro.columbia.edu
Twitter https://twitter.com/david_kipping
Instagram https://www.instagram.com/cool.worlds

THANKS FOR WATCHING!!

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Would you like to help astronomers hunt for planets? Dr Marc Kuchner of NASA, principal investigator of the DiskDetective.org project, visited the Cool Worlds Lab and explains how you can become involved in a real planet hunting program online at DiskDetective.org.

::More about this Video::

► Disk Detective website: www.DiskDetective.org
► Zooniverse website: https://www.zooniverse.org
► Outro music by Taylor Davis: https://www.youtube.com/watch?v=dl9kI1yQKZk

::Playlists For Channel::

Latest Cool Worlds Videos ► http://bit.ly/NewCoolWorlds
Cool Worlds Research ► http://bit.ly/CoolWorldsResearch
Guest Videos ► http://bit.ly/CoolWorldsGuests
Q&A Videos ► http://bit.ly/CoolWorldsQA
Science of TV/Film ► http://bit.ly/ScienceMovies

::Follow us::

SUBSCRIBE to the channel http://bit.ly/CoolWorldsSubscribe
Cool Worlds Lab http://coolworlds.astro.columbia.edu
Twitter https://twitter.com/david_kipping
Instagram https://www.instagram.com/cool.worlds

THANKS FOR WATCHING!!

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Moore's Law has given us exponential improvements in computer technology for many decades, benefiting everything from astrophysics to iPhones, but is it about to end? Jamie Teherani a Columbia Professor of Electrical Engineering, swung by the Cool Worlds Lab to explain what Moore's Law is all about and predict it's future.

::More about this Video::

► Jamie Teherani explains how a computer works video: https://youtu.be/8cVsgFN3hSM
► Video of a black hole tidal disruption event courtesy of NASA: https://youtu.be/hu6hIhW00Fk
► Cool Worlds Lab website: http://coolworlds.astro.columbia.edu
► Columbia University Department of Astronomy: http://www.astro.columbia.edu
► Outro music by Daft Punk "Harder, Better, Stronger, Faster": http://www.daftpunk.com and http://smarturl.it/DaftPunkiTunes

::Playlists For Channel::

Latest Cool Worlds Videos ► http://bit.ly/NewCoolWorlds
Cool Worlds Research ► http://bit.ly/CoolWorldsResearch
Guest Videos ► http://bit.ly/CoolWorldsGuests
Q&A Videos ► http://bit.ly/CoolWorldsQA
Science of TV/Film ► http://bit.ly/ScienceMovies

::Follow us::

SUBSCRIBE to the channel http://bit.ly/CoolWorldsSubscribe
Cool Worlds Lab http://coolworlds.astro.columbia.edu
Twitter https://twitter.com/david_kipping
Instagram https://www.instagram.com/cool.worlds

THANKS FOR WATCHING!!

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