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Published on June 04, 2025

Most stars in the Universe exist in binary or multiple star systems, where the presence of close-in companion stars in such systems can adversely influence the formation and orbital stability of planets around one of the stars. An international team of astrophysicists, involved scientist from institut de planétologie et d’astrophysique de Grenoble (IPAG-OSUG, CNRS/UGA), led by Professor Man Hoi LEE from the Department of Earth Sciences and the Department of Physics at The University of Hong (…)

Published on April 03, 2025

During the Celebrations of the International Year of Glaciers’ Preservation 2025 in Paris on the 20th and 21st March 2025 the IGE has presented the results of several initiatives. Among those, the book “The voices of glaciers : stories of grief and hope amidst shrinking glaciers in the tropics”, co-edited by UNESCO and IRD Editions.
As glacier melting continues unabated at all latitudes, the loss of glaciers in the tropics provides an early glimpse of how a world without ice might be. (…)

Published on March 28, 2025

Newly formed stars are accompanied by massive disks of gas and dust in which planets for in a few million years (or less).
The dust particles they contain, which form the building blocks of future planets, asteroids and comets, range in size from sub-micron, as found in the interstellar medium, to mm-sized pebbles and larger. To build ever larger solid particles, models indicate that it is crucial to strongly concentrate the dust in small volumes, which is likely achieved in disks (…)

Published on February 28, 2025

An international research team, involving numerous French laboratories —including the Institute of Planetology and Astrophysics of Grenoble (OSUG - CNRS/UGA), the Institute of Mineralogy, Materials Physics, and Cosmochemistry (CNRS/IRD/Sorbonne University), the Geology Laboratory of Lyon (CNRS/ENS Lyon/Univ. Claude Bernard/UJM Saint-Etienne), and the Institute for Research in Astrophysics and Planetology (CNRS/CNES/University of Toulouse)—has just detected, thanks to NASA’s Perseverance (…)

Published on January 27, 2025

Author of a publication on nature conservation targets, Ignacio Palomo, researcher IRD at the institut des géosciences de l’environnement (IGE-OSUG, CNRS/IRD/UGA/INRAE/GrenobleINP-UGA) analyses the expectations and challenges of the Biodiversity and Climate COPs.
« As you probably saw in the news, at the end of 2024 world leaders met in Cali, Colombia for the COP16 on biodiversity and in Baku, Azerbaijan for the COP29 on the climate.. For the uninitiated, COP stands for Conference of (…)

Published on January 20, 2025

Astrophysicists led by a team from Trinity have – for the first time – imaged a large number of exocomet belts around nearby stars, and the tiny pebbles within them. Crystal-clear images show light being emitted from millimetre-sized pebbles within the belts that orbit 74 nearby stars of a wide variety of ages – from those that are just emerging from birth to those in more mature systems like our own Solar System.
The REASONS (REsolved ALMA and SMA Observations of Nearby Stars) study (…)

Published on January 10, 2025

Around the edges of the Antarctic ice sheet, glaciers flow toward the ocean, forming long floating ice shelves that regulate the flow of ice from the sheet into the ocean.
The increased loss of mass from the Antarctic ice sheet has been attributed to the significant weakening of these floating ice shelves. This weakening originates from the advection of warm, saline waters of circumpolar origin onto the continental shelf. These waters are then channeled beneath the ice shelves, where they (…)

Published on November 22, 2024

Since the late 1990s, West and Central Africa have seen rainfall levels steadily intensify during monsoon season, leading to more and more episodes of flooding. 2024 has been no exception to that rule: since August, torrential rainfall has already led to flooding in a dozen countries, from the Democratic Republic of Congo to Liberia, not to mention Chad and Mali. These catastrophes have claimed over 1,500 lives and displaced more than 1.2 million people. With dramatic scenes like these being (…)

Published on November 15, 2024

Ranked in the top 150 in the global ranking published last August, Université Grenoble Alpes maintains its position in the Shanghai 2024 ranking with a strong performance in the thematic ranking published on 11 november. For 10 disciplines, the university is in the top 100 of the world’s best universities. It ranks 11th among the world’s top universities in remote sensing (1st in France) and 16th (3rd in France) in Earth Sciences, two themes covered by the OSUG laboratories.
The Shanghai (…)

Published on September 04, 2024

Cement is the world’s most widely used material. Despite centuries of intensive use and ever-increasing global demand, many fundamental physico-chemical questions about its nanoscale structure remain unanswered. An international research team has used neutron scattering techniques to study the dynamics of water inside concrete, one of the keys to its strength.
During the cement setting process, various nanoscopic phases, known as hydrates, are formed. Among these hydrates, calcium (…)