Results 21 to 30 of about 836 (165)
Polycyclic Aromatic Hydrocarbons as an Extraterrestrial Atmospheric Technosignature
The Planetary Science JournalPolycyclic aromatic hydrocarbons (PAHs) are prevalent in the Universe and interstellar medium but are primarily attributed to anthropogenic sources on Earth, such as fossil fuel combustion and firewood burning.
Dwaipayan Dubey +3 more
doaj +3 more sources
An objective Bayesian analysis of life's early start and our late arrival. [PDF]
Proc Natl Acad Sci U S A, 2020 Life emerged on the Earth within the first quintile of its habitable window, but a technological civilization did not blossom until its last. Efforts to infer the rate of abiogenesis, based on its early emergence, are frustrated by the selection effect ...
Kipping D.
europepmc +2 more sources
COSMIC’s Large-scale Search for Technosignatures during the VLA Sky Survey: Survey Description and First Results [PDF]
The Astronomical JournalDeveloping algorithms to search through data efficiently is a challenging part of searching for signs of technology beyond our solar system. We have built a digital signal processing system and computer cluster on the backend of the Karl G.
C. D. Tremblay +11 more
doaj +3 more sources
A note on the Vukotić-Gordon mini-earths [PDF]
Serbian Astronomical Journal, 2023 A recent proposal for a new kind of astroengineering artifact due to Vukotić and Gordon (2022) is discussed, in particular in light of multiple benefits offered by the magnetic Penrose process.
Ćirković Milan M.
doaj +1 more source
A Search for Technosignatures from TRAPPIST-1, LHS 1140, and 10 Planetary Systems in the Kepler Field with the Green Bank Telescope at 1.15–1.73 GHz [PDF]
, 2019 As part of our ongoing search for technosignatures, we collected over three terabytes of data in May 2017 with the L-band receiver (1.15-1.73 GHz) of the 100 m diameter Green Bank Telescope.
Pavlo Pinchuk +18 more
openalex +5 more sources
The search for signs of life on exoplanets at the interface of chemistry and planetary science. [PDF]
Sci Adv, 2015 The discovery of thousands of exoplanets in the last two decades that are so different from planets in our own solar system challenges many areas of traditional planetary science.
Seager S, Bains W.
europepmc +3 more sources
Life detection in a universe of false positives
BioEssays, Volume 45, Issue 12, December 2023., 2023 The ultimate goal of astrobiology is to determine the distribution and diversity of life in the universe. But there's a big problem: Most of the planets in our universe are outside our reach. For these exoplanets, can we really ever be certain if they contain life or not?
Harrison B. Smith, Cole Mathis
wiley +1 more source
The Astronomical Journal, 2023 Agrowing avenue for determining the prevalence of life beyond Earth is to search for “technosignatures” from extraterrestrial intelligences/agents. Technosignatures require significant energy to be visible across interstellar space and thus intentional ...
Sofia Z. Sheikh +16 more
doaj +1 more source
On Detecting Interstellar Scintillation in Narrowband Radio SETI
The Astrophysical Journal, 2023 To date, the search for radio technosignatures has focused on sky location as a primary discriminant between technosignature candidates and anthropogenic radio frequency interference (RFI).
Bryan Brzycki +6 more
doaj +1 more source
The Astronomical Journal, 2023 The primary goal of the search for extraterrestrial intelligence is to gain an understanding of the prevalence of technologically advanced beings (organic or inorganic) in the Galaxy.
C. D. Tremblay +16 more
doaj +1 more source