Results 31 to 40 of about 11,414 (233)
ATLAST detector needs for direct spectroscopic biosignature characterization in the visible and near-IR [PDF]
, 2015 Are we alone? Answering this ageless question will be a major focus for astrophysics in coming decades. Our tools will include unprecedentedly large UV-Optical-IR space telescopes working with advanced coronagraphs and starshades.
Bolcar, Matthew R. +8 more
core +3 more sources
Biosignatures in the solar system [PDF]
The Biochemist, 2018 Humanity's interest in whether or not we are alone in the universe spans generations, from Giordano Bruno's 16th century musings on other worlds and Giovanni Schiaparelli reporting seeing ‘canali’ in 1877 on the surface of Mars (which were thought to have been created by intelligent life) to alien invasions portrayed in today's movies.
Slade, David +3 more
openaire +3 more sources
The Role of N2 as a Geo-Biosignature for the Detection and Characterization of Earth-like Habitats [PDF]
, 2019 Since the Archean, N2 has been a major atmospheric constituent in Earth's atmosphere. Nitrogen is an essential element in the building blocks of life, therefore the geobiological nitrogen cycle is a fundamental factor in the long term evolution of both ...
Cubillos, Patricio E. +6 more
core +2 more sources
Frontiers in Astronomy and Space Sciences, 2022 The detection of biomolecules on Solar System bodies can help us to understand how life emerged on Earth and how life may be distributed in our Solar System.
Loraine Schwander +16 more
doaj +1 more source
The Call for a New Definition of Biosignature [PDF]
Astrobiology, 2023 The term biosignature has become increasingly prevalent in astrobiology literature as our ability to search for life advances. Although this term has been useful to the community, its definition is not settled. Existing definitions conflict sharply over the balance of evidence needed to establish a biosignature, which leads to misunderstanding and ...
Gillen, Catherine +3 more
openaire +2 more sources
Life, 2021 Identifying microbial fossils in the rock record is a difficult task because they are often simple in morphology and can be mimicked by non-biological structures.
Andrew Gangidine +5 more
doaj +1 more source
High Stellar FUV/NUV Ratio and Oxygen Contents in the Atmospheres of Potentially Habitable Planets [PDF]
, 2013 Recent observations of several planet-hosting M dwarfs show that most have FUV/NUV flux ratios 1000 times greater than that of the Sun. Here we show that the atmospheric oxygen contents (O2 and O3) of potentially habitable planets in this type of UV ...
France, Kevin +4 more
core +2 more sources
A Statistical Approach to Illustrate the Challenge of Astrobiology for Public Outreach
Life, 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
Robust monomer-distribution biosignatures in evolving digital biota [PDF]
, 2011 Because organisms synthesize component molecules at rates that reflect those molecules' adaptive utility, we expect a population of biota to leave a distinctive chemical signature on their environment that is anomalous given the local (abiotic) chemistry.
Abelson P.H. +3 more
core +3 more sources
Life, 2018 The acidic sulfate-rich waters of the Meridiani Planum region were potentially a habitable environment for iron-oxidizing bacteria on ancient Mars. If life existed in this ancient martian environment, jarosite minerals precipitating in these waters may ...
Liane Loiselle +5 more
doaj +1 more source