Results 71 to 80 of about 58,525 (269)
Frontiers in Microbiology, 2018 Current knowledge of life in hypersaline habitats is mostly limited to sodium and chloride-dominated environments. This narrow compositional window does not reflect the diversity of brine environments that exist naturally on Earth and other planetary ...
Mark G. Fox-Powell +2 more
doaj +1 more source
Habitability and Spectroscopic Observability of Warm M-dwarf Exoplanets Evaluated with a 3D Chemistry-Climate Model [PDF]
Astrophysical Journal, 2019 Planets residing in circumstellar habitable zones offer us the best opportunities to test hypotheses of life’s potential pervasiveness and complexity. Constraining the precise boundaries of habitability and its observational discriminants is critical to ...
Howard Chen, E. Wolf, Z. Zhan, D. Horton
semanticscholar +1 more source
Accounting for Multiplicity in Calculating Eta Earth [PDF]
, 2019 Using the updated exoplanet population parameters of our previous study, which includes the planetary radius updates from Gaia DR2 and an inferred multiplicity distribution, we provide a revised $\eta_{\oplus}$ calculation.
Hansen, Bradley M. S., Zink, Jon K.
core +2 more sources
An Ionic Limit to Life in the Deep Subsurface
Frontiers in Microbiology, 2019 The physical and chemical factors that can limit or prevent microbial growth in the deep subsurface are not well defined. Brines from an evaporite sequence were sampled in the Boulby Mine, United Kingdom between 800 and 1300 m depth.
Samuel J. Payler +7 more
doaj +1 more source
The habitability of Proxima Centauri b. I. Irradiation, rotation and volatile inventory from formation to the present [PDF]
, 2016 Proxima b is a planet with a minimum mass of 1.3 MEarth orbiting within the habitable zone (HZ) of Proxima Centauri, a very low-mass, active star and the Sun's closest neighbor.
I. Ribas +11 more
semanticscholar +1 more source
Prospects for the characterization of habitable planets
Comptes Rendus. Physique, 2023 With thousands of exoplanets now identified, the characterization of habitable planets and the potential identification of inhabited ones is a major challenge for the coming decades.
Mazevet, Stephane +5 more
doaj +1 more source
Exploring the boundaries of microbial habitability in soil
bioRxiv, 2020 Microbes are widely assumed to be capable of colonizing even the most challenging terrestrial surface environments on Earth given enough time. We would not expect to find surface soils uninhabited by microbes as soils typically harbor diverse microbial ...
N. Dragone +7 more
semanticscholar +1 more source
Degassing of CO2 triggers large-scale loss of helium from magma oceans
Communications Earth & EnvironmentThe moon-forming impact caused widespread melting and vaporization of the proto-Earth, leading to the formation of a protolunar disk1,2. Volatile elements trapped in the inner parts of the disk condensed together with heavier elements into a global magma
Anne H. Davis, Razvan Caracas
doaj +1 more source
Geochemistry, Geophysics, GeosystemsThe widespread High Arctic Large Igneous Province (HALIP) exhibits prolonged melting over more than 50 Myr, an observation that is difficult to reconcile with the classic view that large igneous provinces (LIPs) originate from melting in plume heads ...
Björn H. Heyn +2 more
doaj +1 more source