Uploaded June 2026 | Updated September 2026, 2 weeks ago
Theoretical astrophysicist Brian Lacki joins John Michael Godier to discuss how SETI can expand beyond traditional radio searches into high-energy technosignatures, including X-rays, gamma rays, neutrinos, gravitational waves, alien artifacts, passive broadcasts, and possible relics of advanced civilizations. The conversation explores how future searches might detect signals or byproducts from technologies far beyond our own.
Related papers and resources:
Possibilities for SETI at High Energy
[arxiv.org/abs/2506.16351](https://arxiv.org/abs/2506.16351)
Dust to Dust: Prospects for Passive Technosignatures as Relics of ETI
[arxiv.org/abs/2606.08373](https://arxiv.org/abs/2606.08373)
One of Everything: The Breakthrough Listen Exotica Catalog
[https://ui.adsabs.harvard.edu/abs/2021ApJS..257...42L/abstract](https://ui.adsabs.harvard.edu/abs/2021ApJS..257...42L/abstract)
[iopscience.iop.org/article/10.3847/1538-4365/ac168a](https://iopscience.iop.org/article/10.3847/1538-4365/ac168a)
Lens Flare: Magnified X-Ray Binaries as Passive Beacons in SETI
[https://ui.adsabs.harvard.edu/abs/2020ApJ...905...18L/abstract](https://ui.adsabs.harvard.edu/abs/2020ApJ...905...18L/abstract)
[iopscience.iop.org/article/10.3847/1538-4357/abc1e3](https://iopscience.iop.org/article/10.3847/1538-4357/abc1e3)
SETI at Planck Energy: When Particle Physicists Become Cosmic Engineers
[arxiv.org/abs/1503.01509](https://arxiv.org/abs/1503.01509)
Artificial Broadcasts as Galactic Populations. II. Comparing Individualist and Collective Bounds on Broadcast Populations in Single Galaxies
[https://ui.adsabs.harvard.edu/abs/2024ApJ...966..183L/abstract](https://ui.adsabs.harvard.edu/abs/2024ApJ...966..183L/abstract)
[iopscience.iop.org/article/10.3847/1538-4357/ad11f1](https://iopscience.iop.org/article/10.3847/1538-4357/ad11f1)
Flickers, Bursts, and Dips: Detecting Rapid Variability with the g(2) Autocorrelation Function
[https://ui.adsabs.harvard.edu/abs/2025ApJ...987...68L/abstract](https://ui.adsabs.harvard.edu/abs/2025ApJ...987...68L/abstract)
[https://ui.adsabs.harvard.edu/link_gateway/2025ApJ...987...68L/PUB_HTML](https://ui.adsabs.harvard.edu/link_gateway/2025ApJ...987...68L/PUB_HTML)
Cherenkov Telescopes as Optical Telescopes for Bright Sources: Today’s Specialized 30-m Telescopes?
[https://ui.adsabs.harvard.edu/abs/2011MNRAS.416.3075L/abstract](https://ui.adsabs.harvard.edu/abs/2011MNRAS.416.3075L/abstract)
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Music:
stellardrone.bandcamp.com
migueljohnson.bandcamp.com
leerosevere.bandcamp.com
aeriumambient.bandcamp.com
FOOTAGE:
NASA
ESA/Hubble
ESO - M.Kornmesser
ESO - L.Calcada
ESO - Jose Francisco Salgado (josefrancisco.org)
NAOJ
University of Warwick
Goddard Visualization Studio
Langley Research Center
Pixabay
Theoretical astrophysicist Brian Lacki joins John Michael Godier to discuss how SETI can expand beyond traditional radio searches into high-energy technosignatures, including X-rays, gamma rays, neutrinos, gravitational waves, alien artifacts, passive broadcasts, and possible relics of advanced civilizations. The conversation explores how future searches might detect signals or byproducts from technologies far beyond our own.
Related papers and resources:
Possibilities for SETI at High Energy
[arxiv.org/abs/2506.16351](https://arxiv.org/abs/2506.16351)
Dust to Dust: Prospects for Passive Technosignatures as Relics of ETI
[arxiv.org/abs/2606.08373](https://arxiv.org/abs/2606.08373)
One of Everything: The Breakthrough Listen Exotica Catalog
[https://ui.adsabs.harvard.edu/abs/2021ApJS..257...42L/abstract](https://ui.adsabs.harvard.edu/abs/2021ApJS..257...42L/abstract)
[iopscience.iop.org/article/10.3847/1538-4365/ac168a](https://iopscience.iop.org/article/10.3847/1538-4365/ac168a)
Lens Flare: Magnified X-Ray Binaries as Passive Beacons in SETI
[https://ui.adsabs.harvard.edu/abs/2020ApJ...905...18L/abstract](https://ui.adsabs.harvard.edu/abs/2020ApJ...905...18L/abstract)
[iopscience.iop.org/article/10.3847/1538-4357/abc1e3](https://iopscience.iop.org/article/10.3847/1538-4357/abc1e3)
SETI at Planck Energy: When Particle Physicists Become Cosmic Engineers
[arxiv.org/abs/1503.01509](https://arxiv.org/abs/1503.01509)
Artificial Broadcasts as Galactic Populations. II. Comparing Individualist and Collective Bounds on Broadcast Populations in Single Galaxies
[https://ui.adsabs.harvard.edu/abs/2024ApJ...966..183L/abstract](https://ui.adsabs.harvard.edu/abs/2024ApJ...966..183L/abstract)
[iopscience.iop.org/article/10.3847/1538-4357/ad11f1](https://iopscience.iop.org/article/10.3847/1538-4357/ad11f1)
Flickers, Bursts, and Dips: Detecting Rapid Variability with the g(2) Autocorrelation Function
[https://ui.adsabs.harvard.edu/abs/2025ApJ...987...68L/abstract](https://ui.adsabs.harvard.edu/abs/2025ApJ...987...68L/abstract)
[https://ui.adsabs.harvard.edu/link_gateway/2025ApJ...987...68L/PUB_HTML](https://ui.adsabs.harvard.edu/link_gateway/2025ApJ...987...68L/PUB_HTML)
Cherenkov Telescopes as Optical Telescopes for Bright Sources: Today’s Specialized 30-m Telescopes?
[https://ui.adsabs.harvard.edu/abs/2011MNRAS.416.3075L/abstract](https://ui.adsabs.harvard.edu/abs/2011MNRAS.416.3075L/abstract)
YouTube Membership: youtube.com/channel/UCz3qvETKooktNgCvvheuQDw/join
Podcast: hcreators.spotify.com/pod/show/john-michael-godier/subscribe
Apple: apple.co/3CS7rjT
More JMG
youtube.com/c/JohnMichaelGodier
Want to support the channel?
Patreon: patreon.com/EventHorizonShow
Follow us at other places!
@JMGEventHorizon
Music:
stellardrone.bandcamp.com
migueljohnson.bandcamp.com
leerosevere.bandcamp.com
aeriumambient.bandcamp.com
FOOTAGE:
NASA
ESA/Hubble
ESO - M.Kornmesser
ESO - L.Calcada
ESO - Jose Francisco Salgado (josefrancisco.org)
NAOJ
University of Warwick
Goddard Visualization Studio
Langley Research Center
Pixabay
