Results 21 to 30 of about 1,257,822 (215)

Genoegsame voorwaardes vir buite-aardse rasionaliteit: Filosofiese en teologiese oorwegings

open access: yesHTS Teologiese Studies/Theological Studies, 1996
Sufficient conditions for extraterrestrial intelligence:  Philosophical and theological considerations. Sufficient conditions would include confirmation of extraterrestrial intelligence.
A. J. Antonites
doaj   +1 more source

The Most Sensitive SETI Observations Toward Barnard's Star with FAST

open access: yesThe Astronomical Journal, 2023
Search for extraterrestrial intelligence (SETI) has been mainly focused on nearby stars and their planets in recent years. Barnard’s star is the second closest star system to the Sun and the closest star in the Five-hundred-meter Aperture Spherical radio
Zhen-Zhao Tao   +6 more
doaj   +1 more source

A Statistical Estimation of the Occurrence of Extraterrestrial Intelligence in the Milky Way Galaxy

open access: yesGalaxies, 2021
In the field of astrobiology, the precise location, prevalence, and age of potential extraterrestrial intelligence (ETI) have not been explicitly explored.
Xiang Cai   +3 more
doaj   +1 more source

Is the "Star trek" concept of aliens really naive?: A comment on Duric and Field [PDF]

open access: yesSerbian Astronomical Journal, 2004
Several assumptions used in the recent review paper on the search for extraterrestrial intelligence (SETI) by Duric and Field (2003) are critically discussed.
Ćirković Milan M.
doaj   +1 more source

A note on the Vukotić-Gordon mini-earths [PDF]

open access: yesSerbian 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

The Extraterrestrial Hypothesis: A Case for Scientific Openness to an Interstellar Explanation for Unidentified Anomalous Phenomena [PDF]

open access: yesФилософия и космология
Over the past several years the question of unidentified anomalous phenomena (UAP) has commanded increasing interest. Attention has generally focused on two main classes of hypotheses: a conventional terrestrial explanation (e.g., human technology), and ...
Tim Lomas
doaj   +1 more source

Search for Extraterrestrial Intelligence (SETI) by fractal universe

open access: yesResults in Physics, 2019
We propose the hypothesis that the universes we live are provided with fractal properties, from macro to micro scale, which have self-similarity and space filling.
Sheena Chen, Tong-Jie Zhang
doaj   +1 more source

On the timescale forcing in astrobiology [PDF]

open access: yesSerbian Astronomical Journal, 2007
We investigate the effects of correlated global regulation mechanisms, especially Galactic gamma-ray bursts (GRBs), on the temporal distribution of hypothetical inhabited planets, using simple Monte Carlo numerical experiments.
Vukotić B., Ćirković M.M.
doaj   +1 more source

Stories of astrobiology, SETI, and UAPs: science and the search for extraterrestrial life in German news media from 2009 to 2022 [PDF]

open access: yes, 2023
The search for extraterrestrial intelligent (SETI) and non-intelligent extraterrestrial life has recently received considerable attention in academia and international news media.
Schwarz, Andreas, Seidl, Eva
core   +1 more source

On the detectability of intelligent civilizations in the galaxy [PDF]

open access: yesSerbian Astronomical Journal, 2003
In this paper we argue for the possibility that even in the event of a Galaxy teeming with extraterrestrial intelligence (ETI) the probability of receiving recognizable signals from the ETIs may be very low.
Đurić N., Field L.
doaj   +1 more source

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