Results 51 to 60 of about 613 (177)
Ferric Chloride: The Venusian Unknown UV Absorber?
Journal of Geophysical Research: Planets, Volume 131, Issue 9, September 2026.Abstract Near‐ultraviolet imaging of the planet Venus reveals inhomogeneous absorption features in the otherwise bright clouds. This absorption has been studied for nearly 100 years, but identification of the near‐UV absorber remains one of the largest open questions in Venusian research.
Joanna V. Egan +8 more
wiley +1 more source
Making Classical and Quantum Canonical General Relativity Computable through a Power Series Expansion in the Inverse Cosmological Constant [PDF]
Physical Review Letters, 2000 5 pages, RevTeX with multicol and ...
Gambini, Rodolfo, Pullin, Jorge
openaire +3 more sources
Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.Abstract In this study, we investigate the ionospheric and thermospheric responses to the 2018 Mars global dust storm (GDS 2018) by examining atmosphere–ionosphere coupling through tidal structures. Using Mars Atmosphere and Volatile EvolutioN Neutral Gas and Ion Mass Spectrometer observations, we analyze tidal amplitudes, phases, and inter‐species ...
Noritsugu Nagata +5 more
wiley +1 more source
The Great Cosmic Silence: What Does the Fermi Paradox Tell About the Future of Humanity?
Global Policy, Volume 17, Issue 4, Page 553-565, September 2026.ABSTRACT This article examines how institutional time horizons shape the long‐term survival prospects of human technological civilisation. While research on global catastrophic and existential risks has expanded, the temporal structures of political‐economic institutions remain underexamined.
Heikki Patomäki
wiley +1 more source
Bekenstein’s Entropy Bound-Particle Horizon Approach to Avoid the Cosmological Singularity
Entropy, 2020 The cosmological singularity of infinite density, temperature, and spacetime curvature is the classical limit of Friedmann’s general relativity solutions extrapolated to the origin of the standard model of cosmology.
James R. Powell +2 more
doaj +1 more source
Anselm's Temporal‐Ontological Proof
Noûs, Volume 60, Issue 3, Page 645-660, September 2026.ABSTRACT In his Reply to Gaunilo, Anselm presented two additional arguments for the existence of God beyond those that appear in the Proslogion. In “The Logical Structure of Anselm's Argument,” Robert M. Adams isolates each. One, he develops into a modal ontological argument along the lines of other 20th century ontological arguments (e.g., those of ...
Daniel Rubio
wiley +1 more source
Probing time orientability of spacetime
European Physical Journal C: Particles and Fields, 2023 In general relativity, cosmology and quantum field theory, spacetime is assumed to be an orientable manifold endowed with a Lorentz metric that makes it spatially and temporally orientable.
N. A. Lemos, D. Müller, M. J. Rebouças
doaj +1 more source
Annalen der Physik, Volume 538, Issue 8, August 2026.ABSTRACT The unification of quantum mechanics and general relativity remains a central problem in fundamental physics. Here, we study the gravitomagnetic Aharonov–Bohm (AB) effect for Cooper pairs in Kerr spacetime. Frame‐dragging by a rotating black hole (BH) generates an effective vector potential through the off‐diagonal metric term gtϕ$g_{t\phi }$,
Erdem Sucu, İzzet Sakallı
wiley +1 more source
Living Reviews in Relativity, 2004 The observable universe could be a 1+3-surface (the "brane") embedded in a 1+3+$d$-dimensional spacetime (the "bulk"), with Standard Model particles and fields trapped on the brane while gravity is free to access the bulk.
Maartens Roy
doaj
The ORCA‐TWIN qCMOS Experiment I. Science Case and Commissioning at Calar Alto Observatory
Astronomische Nachrichten, Volume 347, Issue 7, August 2026.ABSTRACT We describe a pilot study to explore a new generation of fast and low noise CMOS image sensors for time domain astronomy, using two remote telescopes with a baseline of 1635 km. The experiment involves direct imaging with novel qCMOS image sensor technology that combines fast readout with sub‐electron readout noise.
Martin M. Roth +20 more
wiley +1 more source