Are Alien "Lurkers" Watching You?

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The search for alien intelligence is usually a framed as a search for life around other stars. But some have suggested that we should look within the Solar System instead – seeking so-called “Lurkers”, alien probes sent here to monitor us. Today we explore this interesting idea, the motivations behind it and where we might actually try surveying.

Written & presented by Prof David Kipping

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► Bohn et al. 2020, Two Directly Imaged, Wide-orbit Giant Planets around the Young, Solar Analog TYC 8998-760-1, ApJL 898, 16:
► Benistry et al. 2021, A Circumplanetary Disk Around PDS70 c, ApJL 916, 2:
Pale Blue Dot NASA JPL/Caltech
► Benford 2019, Looking for Lurkers: Co-orbiters as SETI Observables, AJ 150, 5:….158..150B
► Hippke 2020, Interstellar Communication Network. I. Overview and Assumptions, AJ 159, 10:

Music licensed by (SS) [], or via Creative Commons (CC) Attribution License (, or with permission from the artist
► Brad Hill – Fragile []
► Chris Zabriskie – Cylinder Four
► Atlas – Waking Up
► Falls – Life in Binary
► Falls – Ripley
► Joachim Heinrich – Cassiopeia
► Brad Hill – A Slowly Lifting Fog []
► Chris Zabriskie – Cylinder Five
► Chris Zabriskie – Cylinder Seven
► Joachim Heinrich – Stratosphere
► Indive – Trace Correction

::Video clip credits:: (See for links)
► Licensed clips via Envato
► PHL @ UPR Arecibo, ESO
► ESA/Hubble, M. Kornmesser
► ESA/NASA/JPL/University of Arizona
► National Space Society/NASA
► ESO/L. Calçada, ALMA (ESO/NAOJ/NRAO)/Benisty et al.
► NASA’s Goddard Space Flight Center
► P. Horálek/ESO
► ESO / L. Calçada
► Eameses
► NASA/Goddard Space Flight Center, NOAA, Lockheed Martin
► ESO, M. Kornmesser, L.Calcada
► NASA/ESA/M.Kornmesser
► NASA’s Goddard Space Flight Center
► NASA Jet Propulsion Laboratory
► California Academy of Sciences
► NASA’s Goddard Space Flight Center
► NASA/Jet Propulsion Laboratory-Caltech
► NASA/Goddard Space Flight Center
► ESA/Hubble, NASA, ESO, M. Kornmesser

::Film/TV clips used::
► The Truman Show (1998) Paramount Pictures
► Gravity (2013) Warner Bros. Pictures
► Contact (1997) Warner Bros. Pictures
► First Man (2018) Universal Pictures
► Rogue One: A Star Wars Story (2016) Walt Disney Studios Motion Pictures
► Interstellar (2014) Paramount Pictures
► Star Trek: Voyager (Paramount Television)

Thumbnail by pc8650

00:00 Vistas of Other Worlds
07:52 Imaging via Visitation
11:00 Lurkers
13:15 Sponsorship
14:18 Intercepting LEO Lurkers
16:57 Lunar Lurkers
18:00 Distant Lurkers
21:08 Radio Lurkers
22:46 Flyby
25:49 Concluding Remarks

#Lurkers #Technosignatures #CoolWorlds


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Multiple UFOs traveling in an arc over Astoria, Oregon. 10/6/2021

Quelle est la probabilité de la vie ?