actualités 2024
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A new theory on the origin of water on Earth
H.E.S.S. collaboration detects the most energetic cosmic-ray electrons and positrons ever observed
Astrochemistry, inside cosmic kitchens
The origin of most meteorites finally revealed
Planet 9, do you copy?
James Webb Space Telescope provides first hints of evidence of the existence of an ocean exoplanet
First time brown dwarfs seen so near host stars
Astronomy/Space
Results 1 - 9 of 9.
Astronomy / Space - 03.12.2024

A team of astronomers has identified a potential new mechanism for bringing water to Earth, offering a promising departure from previous theories. Based on numerous observations of the Solar System, as well as observations of extrasolar debris disks by the ALMA radio telescope, the results are published in the journal Astronomy and Astrophysics .
Astronomy / Space - Physics - 18.11.2024

Scientists from the CNRS, a consortium of German universities, and the Max-Planck-Institut für Kernphysik working at the H.E.S.S. observatory have recently identified electrons and positrons with the highest energies ever recorded on Earth. They provide evidence of cosmic processes emitting colossal amounts of energy, the origins of which are as yet unknown.
Astronomy / Space - Chemistry - 15.11.2024

Astrochemistry, a relatively new field, focuses on exploring chemistry in interstellar spaces to uncover insights about the origins of life on Earth. This discipline has seen significant advancements in recent years. Born in the late 1930s with the development of spectroscopy and radio astronomy, astrochemistry, a field at the intersection of astrophysics and chemistry, is now mature.
Astronomy / Space - 17.10.2024

An international team led by three researchers from the CNRS1, the European Southern Observatory (ESO, Europe), and Charles University (Czech Republic) has successfully demonstrated that 70% of all known meteorite falls originate from just three young asteroid families. These families were produced by three recent collisions that occurred in the main asteroid belt 5.8, 7.5, and about 40 million years ago.
Astronomy / Space - Environment - 09.09.2024
Extent of CO2 and CO ices in the trans-Neptunian region revealed by JWST
Publication of the LGL-TPE in the journal Nature Astronomy on May 22, 2024. Communication by CNRS Earth & Space on June 19, 2024. Carbon dioxide (CO2) is one of the most abundant ices in the Solar System. It has been detected in giant planet atmospheres and on their moons, on and around comets, and even in regions of Mercury, the Moon and Mars.
Astronomy / Space - Environment - 30.08.2024

For nearly ten years, astronomers have been trying to demonstrate the existence of a massive object thought to be orbiting in the outer reaches of the Solar System. Although the hypothesis is widely debated, a recent study claims that the absence of such a body is statistically impossible. Now that Pluto is no longer considered a true planet, the Solar System counts just eight such bodies.
Astronomy / Space - Earth Sciences - 08.07.2024

A team of CNRS planetary scientists 1 working in collaboration with astronomers from the University of Montréal has presented first evidence that the temperate exoplanet LHS 1140b could be an ocean world. Over the past few years, the planet, which is located around 48 light-years from the Solar System in the constellation Cetus, has been observed by the Hubble, Spitzer and TESS space telescopes, as well as by the ESPRESSO instrument mounted on the VLT telescope in Chile.
Astronomy / Space - 20.06.2024

A team of researchers including French scientists from the CNRS, Université Grenoble Alpes, and the Observatoire de Paris-PSL 1 have for the first time ever observed brown dwarfs orbiting very near bright stars-a feat for precise astronomical imaging. Out of the eight companions 2 imaged, the researchers determined that five were brown dwarfs, substellar celestial objects that are still poorly understood, neither stars nor planets but something in between.
Astronomy / Space - Physics - 24.04.2024
Gaia BH3, the black hole that shouldn’t exist
The recent discovery of a binary system containing an extremely rare object, the most massive black hole (apart from SgrA*) ever detected in our Galaxy, calls into question the models for the formation of these bodies. Up until now, the Gaia space observatory has been used to observe the position and motion of stars, uncover the underlying structures of our Galaxy, and find new exoplanets.
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