Veille du 1er novembre 2026 : cadres de fiabilité pour agents, radiotélescope piloté par IA, apprentissage multimodal, interprétabilité et politique des infrastructures.

Les chercheurs orléanais pourront exploiter les données d’un observatoire géant pour étudier notamment les pulsars, selon « ICI »

Astronomers using the Canadian Hydrogen Intensity Mapping Experiment (CHIME) radio telescope in Penticton, British Columbia, have achieved the most distant measurement of hydrogen distribution in the universe to date. The detection, published in the Astrophysical Journal, reveals hydrogen signals from approximately 8 billion light years away, providing new insights into how matter organized after the Big Bang. The CHIME telescope, operational since 2017, consists of trough-like antennas that passively gather radio waves as the Earth rotates, creating a comprehensive map of the radio sky. The team faced significant challenges, including filtering out radio noise from the Milky Way, which is up to ten thousand times stronger than the faint hydrogen signal they sought. They also had to contend with increasing human-generated radio interference from electronics in cars and personal devices. After analyzing data collected over 2,000 days, the researchers narrowed their focus to 94 days with ideal conditions, spending over two years verifying their findings. The detection supports existing models of large-scale cosmic structure and could eventually allow for direct measurement of the universe's expansion rate, providing an independent way to study dark energy. Dr. Mark Halpern, a University of British Columbia professor and principal investigator, emphasized that this measurement was the primary goal of the CHIME project. The findings have been praised by astrophysicists like Will Percival of the University of Waterloo, who called it a significant achievement given the difficulty of extracting such a faint signal from the data. This breakthrough represents a major step forward in understanding the universe's evolution and the role of dark energy in its expansion.

Depuis 1998, le radiotélescope de Parkes en Australie enregistrait des signaux mystérieux que les astronomes croyaient venus de l'espace. Après 17 ans de recherches, les chercheurs ont découvert que l...

Le radiotélescope FAST a capté près de K2-155 un signal qui coche les critères d'une technosignature. Voici la grille de tri des astronomes, et pourquoi elle penche vers un brouillage terrestre.

DSA-2000 — Deep Synoptic Array (DSA)Le Deep Synoptic Array (DSA), un radiotélescope de nouvelle génération, est en cours de construction dans la vallée de Spring, au Nevada, États-Unis. Ce projet ambitieux vise à révolutionner l'étude de l'univers en offrant une sensibilité et une couverture du ciel

Le Radiotélescope de Nançay : Un Géant de la Science en SologneFait PrincipalDepuis 1965, le radiotélescope de Nançay, situé en Sologne, est l'un des instruments scientifiques les plus remarquables d'Europe, capable de détecter des signaux radio d'une extrême faiblesse.Contexte FactuelCe radiotélesc