Results 31 to 40 of about 5,661,388 (213)

A More Comprehensive Habitable Zone for Finding Life on Other Planets

open access: yesGeosciences, 2018
The habitable zone (HZ) is the circular region around a star(s) where standing bodies of water could exist on the surface of a rocky planet. Space missions employ the HZ to select promising targets for follow-up habitability assessment.
Ramses M. Ramirez
doaj   +1 more source

Viroids-First—A Model for Life on Earth, Mars and Exoplanets

open access: yesGeosciences, 2019
The search for extraterrestrial life, recently fueled by the discovery of exoplanets, requires defined biosignatures. Current biomarkers include those of extremophilic organisms, typically archaea.
Karin Moelling, Felix Broecker
doaj   +1 more source

Astrotheology’s contribution to public theology: From the extraterrestrial intelligence myth to astroethics

open access: yesHTS Teologiese Studies/Theological Studies, 2021
Public theology is conceived in the church, reflected on critically in the academy and addressed to the world for the sake of the world. The development of a theology of nature is included in the public theologian’s list of tasks of nature that is ...
Ted Peters
doaj   +1 more source

A Statistical Approach to Illustrate the Challenge of Astrobiology for Public Outreach

open access: yesLife, 2017
In this study, we attempt to illustrate the competition that constitutes the main challenge of astrobiology, namely the competition between the probability of extraterrestrial life and its detectability.
Frédéric Foucher   +3 more
doaj   +1 more source

Circular Spectropolarimetric Sensing of Vegetation in the Field: Possibilities for the Remote Detection of Extraterrestrial Life. [PDF]

open access: yesAstrobiology, 2019
Homochirality is a generic and unique property of all biochemical life, and the fractional circular polarization of light it induces therefore constitutes a potentially unambiguous biosignature.
C. H. L. Patty   +6 more
semanticscholar   +1 more source

Alien life matters: reflections on cosmopolitanism, otherness, and astrobiology

open access: yesCosmopolitan Civil Societies: An Interdisciplinary Journal, 2016
This is a synaptic paper that invites the reader to take a stroll on the edges of cross-disciplinary knowledge. We will walk the roads of anthropology, history, philosophy, astronomy and biology.
Andre Novoa
doaj   +1 more source

Space experiment on the “catching” of astromaterials in near space to search for extraterrestrial life

open access: yesВісник Астрономічної школи, 2018
Asteroids and cometary nuclei consist of the same primary substance as the gas-dust cloud from which the solar system was formed. Now this substance is being studied in the meteorite material that fell to the Earth's surface. NASA experts suggested after
A. P. Vidmachenko, A. F. Steklov
doaj   +1 more source

Is Extraterrestrial Life Suppressed on Subsurface Ocean Worlds due to the Paucity of Bioessential Elements? [PDF]

open access: yesAstronomical Journal, 2018
The availability of bioessential elements for “life as we know it”, such as phosphorus (P) or possibly molybdenum (Mo), is expected to restrict the biological productivity of extraterrestrial biospheres.
M. Lingam, A. Loeb
semanticscholar   +1 more source

Detection of Microorganisms in Low-Temperature Water Environments by in situ Generation of Biogenic Nanoparticles

open access: yesFrontiers in Astronomy and Space Sciences, 2020
A new nanobiotechnological approach for the detection of extraterrestrial Earth-like biological forms is proposed. The approach is based on the ability of microbial cells to reduce artificially added cations with the generation of crystalline ...
Dmitry A. Skladnev   +8 more
doaj   +1 more source

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

open access: yesThe 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   +10 more
doaj   +1 more source

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