Results 161 to 170 of about 2,461 (244)

Obscuration of Crystalline Ca‐Sulfate in XRD and Raman Data When Coated by Amorphous Ferric Sulfate: Implications for the Amorphous Components at Gale Crater

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract Throughout Gale crater on Mars, the Curiosity rover has found high abundances (15–73 wt%) of X‐ray amorphous materials in the rocks and sediments. The composition of this amorphous fraction is primarily calculated by subtracting crystalline abundances measured by the Chemistry & Mineralogy X‐Ray Diffractometer (CheMin) from bulk elemental ...
R. J. Hopkins, A. D. Rogers, L. Ehm
wiley   +1 more source

Comparing the motion of dark matter and standard model particles on cosmological scales. [PDF]

Nat Commun
Grimm N, Bonvin C, Tutusaus I.
europepmc   +1 more source

A Study on CO2 ${\text{CO}}_{2}$ Supersaturation in the Martian Southern Polar Night Using Mars Global Surveyor Radio Occultation Profiles Rederived With Mars Climate Sounder Temperature Climatology

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract We investigate CO2 ${\text{CO}}_{2}$ supersaturation in the Martian southern polar night using rederived vertical profiles from Mars Global Surveyor (MGS) radio occultation (RO) measurements. Supersaturation, which affects not only local condensation but also the polar and global atmospheric dynamics, occurs when temperatures fall below the ...
Katsuyuki Noguchi, Armin Kleinböhl, Sylvain Piqueux   +2 more
wiley   +1 more source

JWST interferometric imaging reveals the dusty torus obscuring the supermassive black hole of Circinus galaxy. [PDF]

Nat Commun
Lopez-Rodriguez E, Sanchez-Bermudez J, González-Martín O, Nikutta R, Lau RM, Thatte D, García-Bernete I, Girard JH, Hankins MJ.   +8 more
europepmc   +1 more source

Why Mature Galaxies Seem to Have Filled the Universe Shortly After the Big Bang — A New Cosmological Model, that Predicted the JWST Observations [PDF]

Arthur Pletcher
openalex   +1 more source

Ozone Production by Electron Irradiation of Regolith Ice: Laboratory Study for the Icy Moons

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract We irradiate fine‐grained regolith pure water ice in ultra high vacuum with 5keV $5\,\text{keV}$ and 10keV $10\,\text{keV}$ electrons to study the radiolysis of water ice. The ice regolith is designed to closely mimic the physical characteristics of the surfaces of the icy moons of the Solar System.
Lorenzo Obersnel, André Galli, Rico G. Fausch, Rafael Ottersberg, Peter Wurz   +4 more
wiley   +1 more source

Implications of cosmologically coupled black holes for pulsar timing arrays. [PDF]

Sci Rep
Calzà M, Gianesello F, Rinaldi M, Vagnozzi S.   +3 more
europepmc   +1 more source

On the Possibility of Melting Water Ice During the Recent Past of Mars: Implications for the Formation of Gullies

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract The formation of gullies on Mars has often been attributed to the melting of (sub)surface water ice. However, melting‐based hypotheses generally overlook key processes: (a) sublimation cooling by latent heat absorption, (b) the non‐stability of ice where melting conditions can be reached, and (c) the particular microclimates of gullied slopes.
L. Lange, F. Forget
wiley   +1 more source

Cosmic mysteries and the hydrogen 21-cm line: bridging the gap with lunar observations. [PDF]

Philos Trans A Math Phys Eng Sci
Fialkov A, Gessey-Jones T, Dhandha J.
europepmc   +1 more source

Assemblage, archive, and ancestor: Developing more‐than‐human historical geography with salmon

Geographical Research, Volume 64, Issue 1, February 2026.
This paper interrogates recent geographic literature on the more‐than‐human archive and argues that there needs to be more specificity when conceptualising and researching the more‐than‐human. It then answers this call for specificity by theorising three modes of more‐than‐human historical geography that are developed through empirical encounters with ...
Austin Read
wiley   +1 more source