cosmologie

La science de l'origine, de l'évolution et de la structure à grande échelle de l'univers.

Articles about cosmologie

Physics
Dark Matter: Illusion or Reality?

Dark Matter: Illusion or Reality?
A University of Ottawa paper claims 'dark matter does not' exist and is an emergent illusion of changing physical constants — a provocative idea that collides with new gamma‑ray s…
Space
JWST Reveals Celebrity Cluster MACS J1149

JWST Reveals Celebrity Cluster MACS J1149
The James Webb Space Telescope has released a new, deep infrared image of the massive galaxy cluster MACS J1149.5+2223, showing dramatic gravitational lensing and revealing faint,…
Physics
Is Reality a Hologram?

Is Reality a Hologram?
The holographic principle — born from black hole thermodynamics and sharpened by string theory — posits that the information in a volume of space can be encoded on its boundary. P…
Space
Space as a Sticky Fluid?

Space as a Sticky Fluid?
A late‑2025 arXiv preprint proposes that the vacuum behaves like a viscous, elastic medium with 'spatial phonons'—a phenomenological model that the author says can reconcile tensi…
Space
Cloud 9: A Failed Galaxy Revealed

Cloud 9: A Failed Galaxy Revealed
Using Hubble and radio telescopes, astronomers have confirmed a starless, gas-rich dark-matter cloud — nicknamed Cloud‑9 — that matches long-standing theoretical predictions of a …
Science
2025: Space, Stones and Conscious Minds

2025: Space, Stones and Conscious Minds
A wide-angle review of 2025’s defining science stories — from Webb’s puzzling ‘little red dots’ and DESI’s hints that dark energy may be changing, to a wave of archaeological find…
Physics
Pi in Nature: Ramanujan's Surprise

Pi in Nature: Ramanujan's Surprise
A team at the Indian Institute of Science reports in Physical Review Letters (22 December 2025) that formulas Srinivasa Ramanujan discovered more than a century ago reappear insid…
Space
SPHEREx Maps Sky in 102 Infrared Colors

SPHEREx Maps Sky in 102 Infrared Colors
NASA's SPHEREx mission has completed a full-sky survey in 102 infrared bands, producing a multilayered cosmic atlas that scientists say can turn a flat star chart into a 3D map of…
Space
Cosmic Knots: A New Origin Story

Cosmic Knots: A New Origin Story
A new Physical Review Letters paper proposes stable 'cosmic knots' formed after the Big Bang could have produced heavy neutrinos that tipped the balance toward matter; the idea ma…