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The Optical Search for Extraterrestrial Intelligence (OSETI) attempts to detect collimated, narrowband pulses of electromagnetic radiation. These pulses may either consist of signals intentionally directed at the Earth, or signals between…

Popular Physics · Physics 2014-10-30 Duncan H. Forgan

A major aspect of the search for extraterrestrial intelligence (SETI) involves searching for electromagnetic transmissions from extraterrestrial sources, often using our own transmissions as a guide. Previous studies have suggested that…

Instrumentation and Methods for Astrophysics · Physics 2025-08-22 Pinchen Fan , Jason T. Wright , T. Joseph W. Lazio

Deliberate and unintentional radio transmissions from Earth propagate into space. These transmissions could be detected by extraterrestrial watchers over interstellar distances. Here, we analyze the harms and benefits of deliberate and…

Popular Physics · Physics 2013-03-19 Jacob Haqq-Misra , Michael Busch , Sanjoy Som , Seth Baum

There is an ongoing debate pertaining to the question of whether Earth should initiate intentional and powerful radio transmissions to putative extra-terrestrial (ET) civilizations in the hope of attracting ET's attention. This practice is…

Popular Physics · Physics 2021-06-09 John Gertz

The transmission of news stories in global culture has changed fundamentally in the last three decades. The general public are alerted to breaking stories on increasingly rapid timescales, and the discussion/distortion of facts by writers,…

Physics and Society · Physics 2016-06-22 Duncan Forgan , Alexander Scholz

The radio Search for Extra Terrestrial Intelligence (SETI) aims at identifying intelligent and communicative civilizations in the Universe through the detection of engineered transmissions. In the absence of prior knowledge concerning the…

Signal Processing · Electrical Eng. & Systems 2018-09-12 Gregory Hellbourg , Andrew Xu

Over a period of several decades a concerted effort has been made to determine whether intelligent life exists outside of our solar system, known as the Search for Extraterrestrial Intelligence or SETI. This has been based primarily upon…

General Physics · Physics 2007-05-23 Fred H. Thaheld

Land-based beacons, information laden probes sent into our solar system, and more distal communication nodes have each been proposed as the most likely means by which we might be contacted by ET. Each method, considered in isolation from…

Popular Physics · Physics 2021-06-09 John Gertz

Regulations governing METI are weak or non-existent. Post-detection SETI protocols are non-binding and too general. Vastly increased SETI capabilities, Chinese involvement in the field, and an intensified effort by METI-ists to initiate…

Popular Physics · Physics 2021-06-09 John Gertz

The Search for Extraterrestrial intelligence (SETI) is a scientific and cultural effort seeking evidence of intelligent life beyond earth. Radio SETI observes the radio spectrum for ''technosignatures" that could be produced by an advanced…

Instrumentation and Methods for Astrophysics · Physics 2021-09-29 Kenneth M. Houston , Andrew P. V. Siemion , Steve Croft

The advent of continuously learning Artificial Intelligence (AI) assistants marks a paradigm shift from episodic interactions to persistent, memory-driven relationships. This paper introduces the concept of "Cognitive Sovereignty", the…

Computers and Society · Computer Science 2025-08-11 Mario Brcic

The Search for Extraterrestrial Intelligence (SETI) is a research activity that started in the late 1950s, predating the arrival of "Big History" and "Astrobiology" by several decades. Many elements first developed as part of the original…

Popular Physics · Physics 2021-08-04 Michael A. Garrett

In this paper we consider the extent to which a lack of observations from SETI may be used to quantify the Fermi paradox. Building on previous research, we construct a geometrical model to compute the probability of at least one detection…

Instrumentation and Methods for Astrophysics · Physics 2025-12-29 Matthew Civiletti

USA Government wiretapping activities is a very controversial issue. Undoubtedly this technology can assist law enforced authority to detect / identify unlawful or hostile activities; however, this task raises severe privacy concerns. In…

Computers and Society · Computer Science 2010-12-01 Arwen Mullikin , Syed , M. Rahman

This white paper highlights the work that is needed to anticipate the challenges and societal impacts of a possible technosignature detection. We recommend practical steps to strengthen NASA's astrobiology agenda, guided by the existing…

The Search for Extraterrestrial Intelligence (ETI) is, historically, a search for aliens like us, inspired by human centric ideas of intelligence and technology. However, humans are not the only instance of an intelligent, communicating…

Instrumentation and Methods for Astrophysics · Physics 2025-11-11 Cameron Brooks , Estelle Janin , Gage Siebert , Cole Mathis , Orit Peleg , Sara Imari Walker

This work investigates the security and reliability analysis for a novel satellite-terrestrial (SatTer) network. Specifically, a satellite attempts to transmit confidential information to a ground user (GU) via the support of multiple relay…

Information Theory · Computer Science 2023-06-21 Tan N. Nguyen , Dinh-Hieu Tran , Trinh Van Chien , Van-Duc Phan , Miroslav Voznak , Symeon Chatzinotas

The goal of the search for extraterrestrial intelligence (SETI) is the detection of non-human technosignatures, such as technology-produced emission in radio observations. While many have speculated about the character of such…

Instrumentation and Methods for Astrophysics · Physics 2022-08-10 Bryan Brzycki , Andrew P. V. Siemion , Imke de Pater , Steve Croft , John Hoang , Cherry Ng , Danny C. Price , Sofia Z. Sheikh , Zihe Zheng

Motivated by recent developments impacting our view of Fermi's paradox (absence of extraterrestrials and their manifestations from our past light cone), we suggest a reassessment of the problem itself, as well as of strategies employed by…

Astrophysics · Physics 2009-09-29 Milan M. Cirkovic , Robert J. Bradbury

We motivate the \^G infrared search for extraterrestrial civilizations with large energy supplies. We discuss some philosophical difficulties of SETI, and how communication SETI circumvents them. We review "Dysonian SETI", the search for…

Popular Physics · Physics 2015-06-22 J. T. Wright , B. Mullan , S. Sigurðsson , M. S. Povich