Results 41 to 50 of about 357 (153)

Climate Emergency and Different Ways to Fail? The Fermi Paradox, the Simulation Hypothesis, Agency and Hope

Journal for the Theory of Social Behaviour, Volume 55, Issue 4, December 2025.
ABSTRACT Humanity seems stuck on different ways to fail to meet the challenge posed by a declared climate emergency and manifest problems of ecological breakdown. Rather than reprise these failures, we use the Fermi Paradox and simulation hypothesis to make a simple point about agency. The argument unfolds in two sections.
Jamie Morgan
wiley   +1 more source

Multibeam Blind Search of Targeted SETI Observations toward 33 Exoplanet Systems with FAST

The Astronomical Journal, 2023
The search for extraterrestrial intelligence (SETI) is to search for technosignatures associated with extraterrestrial life, such as engineered radio signals.
Xiao-Hang Luan, Zhen-Zhao Tao, Hai-Chen Zhao, Bo-Lun Huang, Shi-Yu Li, Cong Liu, Hong-Feng Wang, Wen-Fei Liu, Tong-Jie Zhang, Vishal Gajjar, Dan Werthimer   +10 more
doaj   +1 more source

What is the noosphere? Planetary superorganism, major evolutionary transition and emergence

Systems Research and Behavioral Science, Volume 41, Issue 4, Page 614-622, July/August 2024.
Abstract The noosphere remains an underappreciated and understudied idea despite that it provides unique hope towards a positive and meaningful global integration. A core reason for this lack of attention is that its very definition is often unclear both in the West with Teilhard de Chardin and in the East with Vernadsky.
Clément Vidal
wiley   +1 more source

Signal Synchronization Strategies and Time Domain SETI with Gaia DR3

The Astronomical Journal, 2023
Spatiotemporal techniques for signal coordination with actively transmitting extraterrestrial civilizations, without the need for prior communication, can constrain technosignature searches to a significantly smaller coordinate space.
Andy Nilipour, James R. A. Davenport, Steve Croft, Andrew P. V. Siemion   +3 more
doaj   +1 more source

The radio search for technosignatures in the decade 2020-2030 [PDF]

, 2019
Advancing the scientific frontier in the search for life in the universe requires support of searches for both biosignatures and technosignatures. A modest budgetary increment can expand the search for life in the universe from primitive to complex life ...
Korpela, Eric J, Lazio, T Joseph W, Margot, Jean-Luc, Croft, Steve, Tarter, Jill   +4 more
core   +1 more source

Specular Reflections from Artificial Surfaces as Technosignature

Astrobiology, 2023
Direct imaging of exoplanets will allow for observation of a planet in reflected light. Such a scenario may eventually allow for the possibility to scan a planetary surface for the presence of artificial structures made by alien civilizations. Detectability of planetary-scale structures, called megastructures, has been previously explored. In this work,
openaire   +3 more sources

A Search for Technosignatures around 31 Sun-like Stars with the Green Bank Telescope at 1.15–1.73 GHz [PDF]

, 2021
We conducted a search for technosignatures in 2018 and 2019 April with the L-band receiver (1.15-1.73 GHz) of the 100 m diameter Green Bank Telescope. These observations focused on regions surrounding 31 Sun-like stars near the plane of the Galaxy.
Schmidgall, Carlyn, Gonzales, Julia, Nagib, Caroline, Arora, Sparsh, Dunne, Riley, Geil, Robert, Desai, Sanjana Prabhu, Gonzalez, Alexander, Li, Grace, Molina, Eden, Lynch, Ryan S, Shah, Rehan, Biswas, Swagata, Lewis, Briley, Cebreros, Jose, Seth, Samar, Makarem, Christopher, Zhu, Lujia, Tokadjian, Armen, Manan, Ivan, Pinchuk, Pavlo, Goel, Shashwat, Lam, Adrian, Alexander, Stephen, Neville, Kyle, Jain, Rishabh, Rokushima, Yoichiro, Rockwell, Valerie, Lewis, Rebecca, Villafana, Lizvette, Romanek, Griffin, Shimane, Yuri, MacDougall, Mason, Wang, Zhixian, Duclos, Benjamin, O’Toole, Connor, Margot, Jean-Luc, Singhal, Myank, Fu, Kristy Kwan Lin, Yun, In   +39 more
core   +1 more source

Undetected Past Contacts with Technological Species: Implications for Technosignature Science

The Astronomical Journal
In the search for extraterrestrial intelligence (SETI), the highly incomplete sampling of the technosignature search space is often considered as a plausible explanation for the persistent lack of detections over six decades of searches. If correct, this
Claudio Grimaldi
doaj   +1 more source

Technosignatures in the Solar System

, 2022
Abstract: NASA has five robotic space probes on escape trajectories from the solar system (Pioneer 11, Pioneer 12, Voyager 1, Voyager 2, and New Horizons), and the Interstellar Probe is a concept likely to be submitted for consideration in the forthcoming Solar & Space Physics Decadal Survey.
openaire   +2 more sources

Nine axes of merit for technosignature searches [PDF]

International Journal of Astrobiology, 2019
AbstractIt can be difficult to develop an effective and balanced search strategy in SETI, especially from a funding perspective, given the diverse methodologies and myriad orthogonal proposals for the best technosignatures. Here I propose a framework to compare the relative advantages and disadvantages of various proposed technosignatures based on nine
openaire   +2 more sources