Results 51 to 60 of about 41,407 (283)

Degassing of CO2 triggers large-scale loss of helium from magma oceans

open access: yesCommunications Earth & Environment
The 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

Habitability of Mars: How Welcoming Are the Surface and Subsurface to Life on the Red Planet?

open access: yesGeosciences, 2019
Mars is a planet of great interest in the search for signatures of past or present life beyond Earth. The years of research, and more advanced instrumentation, have yielded a lot of evidence which may be considered by the scientific community as proof of
Aleksandra Checinska Sielaff   +1 more
doaj   +1 more source

On the radius of habitable planets [PDF]

open access: yes, 2013
The conditions that a planet must fulfill to be habitable are not precisely known. However, it is comparatively easier to define conditions under which a planet is very likely not habitable.
Alibert, Yann
core   +3 more sources

Charge State Influence on Stability and Isomerism in Dehydrogenated PAHs: Insights from Anthracene, Acridine, and Phenazine

open access: yesChemPhysChem, Volume 26, Issue 6, March 15, 2025.
The ionization of anthracene, acridine, and phenazine has been explored, along with the removal of one and two hydrogen atoms, to provide valuable information for astrochemists and to understand the behavior of the resulting structures and their electronic reorganization. Abstract In this study, we systematically explored the stability and isomerism of
Khaldia Zghida   +3 more
wiley   +1 more source

Prolonged Multi‐Phase Magmatism Due To Plume‐Lithosphere Interaction as Applied to the High Arctic Large Igneous Province

open access: yesGeochemistry, Geophysics, Geosystems
The 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

An Ionic Limit to Life in the Deep Subsurface

open access: yesFrontiers 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

Organic semiconductors: A versatile next‐generation photovoltaics technology

open access: yesInformation &Functional Materials, EarlyView.
Organic semiconductors exhibit excellent environmental and biocompatibility, as compared to other emerging materials, thereby offering wider range of possible photovoltaic applications beyond traditional solar farms. However, to fully construct practical and commercially attractive devices, the factors specific to intended type of PV applications must ...
Top Archie Dela Peña   +10 more
wiley   +1 more source

A Terminology and Quantitative Framework for Assessing the Habitability of Solar System and Extraterrestrial Worlds

open access: yesThe Planetary Science Journal
The search for extraterrestrial life in the solar system and beyond is a key science driver in astrobiology, planetary science, and astrophysics. A critical step is the identification and characterization of potential habitats, both to guide the search ...
Dániel Apai   +15 more
doaj   +1 more source

The Influence of Tidal Heating on the Habitability of Planets Orbiting White Dwarfs

open access: yesThe Astrophysical Journal Letters, 2023
In recent years, there have been a growing number of observations indicating the presence of rocky material in short-period orbits around white dwarfs. In this Letter, we revisit the prospects for habitability around these post-main-sequence star systems.
Juliette Becker   +3 more
doaj   +1 more source

Exomoon habitability constrained by energy flux and orbital stability

open access: yes, 2012
Detecting massive satellites of extrasolar planets has now become feasible, which led naturally to questions about their habitability. In a previous study we presented constraints on the habitability of moons from stellar and planetary illumination as ...
Barnes   +25 more
core   +1 more source

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