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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

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THANKYOU 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/...)

► Brad Hill Of Love and Loss [https://open.spotify.com/album/2oDAnU...]
► 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

#NoGreenStars #Technosignatures #CoolWorlds