9 - SCIENCE - JoanMira
La Science sous toutes ses formes/Science in all its forms
Nombre total de pages vues
11/07/2025
SANTé/MEDECINE - Détecter le cancer dans les analyses de sang - (4) - Des bénéfices extraordinaires pour la santé publique
LA TERRE VUE DU CIEL - Glaciers de Patagonie
ASTRONOMY - The Veins of Heaven
Image Credit & Copyright: P-M Hedén (Clear Skies, TWAN)
Explanation: Transfusing sunlight as the sky grew darker, this exceptional display of noctilucent clouds was captured on July 10, reflected in the calm waters of Vallentuna Lake near Stockholm, Sweden. From the edge of space, about 80 kilometers above Earth's surface, the icy clouds themselves still reflect sunlight, even though the Sun is below the horizon as seen from the ground. Usually spotted at high latitudes in summer months, the night shining clouds have made a strong showing so far during the short northern summer nights. Also known as polar mesopheric clouds they are understood to form as water vapor driven into the cold upper atmosphere condenses on the fine dust particles supplied by disintegrating meteors or volcanic ash.
10/07/2025
SANTé/MEDECINE - Détecter le cancer dans les analyses de sang - (3) - Comment fonctionne la détection précoce ?
LA TERRE VUE DU CIEL - Londres vue de l'ISS
ASTRONOMY - Lynds Dark Nebula 1251
Image Credit & Copyright: Cristiano Gualco
Explanation: Stars are forming in Lynds Dark Nebula (LDN) 1251. About 1,000 light-years away and drifting above the plane of our Milky Way galaxy, LDN 1251 is also less appetizingly known as "The Rotten Fish Nebula." The dusty molecular cloud is part of a complex of dark nebulae mapped toward the Cepheus flare region. Across the spectrum, astronomical explorations of the obscuring interstellar clouds reveal energetic shocks and outflows associated with newborn stars, including the telltale reddish glow from scattered Herbig-Haro objects hiding in the image. Distant background galaxies also lurk in the scene, almost buried behind the dusty expanse. This alluring telescopic frame spans almost three full moons on the sky. That corresponds to over 25 light-years at the estimated distance of LDN 1251.
09/07/2025
LA TERRE VUE DU CIEL - Cercles d'irrigation dans le désert

SANTé/MEDECINE - Détecter le cancer dans les analyses de sang - (2) - Une technologie qui change la donne
ASTRONOMY - A Beautiful Trifid
2025 July 9
Image Credit & Copyright: Alessandro Cipolat Bares
Explanation: The beautiful Trifid Nebula is a cosmic study in contrasts. Also known as M20, it lies about 5,000 light-years away toward the nebula rich constellation Sagittarius. A star forming region in the plane of our galaxy, the Trifid does illustrate three different types of astronomical nebulae; red emission nebulae dominated by light from hydrogen atoms, blue reflection nebulae produced by dust reflecting starlight, and dark nebulae where dense dust clouds appear in silhouette. But, the red emission region roughly separated into three parts by obscuring dust lanes is what lends the Trifid its popular name. Pillars and jets sculpted by newborn stars, above and right of the emission nebula's center, appear in famous Hubble Space Telescope close-up images of the region. The Trifid Nebula is about 40 light-years across. Too faint to be seen by the unaided eye, in this deep telescopic view it almost covers the area of a full moon on planet Earth's sky.
08/07/2025
SANTé/MEDECINE - Détecter le cancer dans les analyses de sang - Une avancée médicale qui bouleverse tout
SANTé/MEDECINE - Détecter le cancer dans les analyses de sang - (4) - Des bénéfices extraordinaires pour la santé publique
Un espoir pour des millions de personnes. Cette découverte représente une lueur d’espoir pour tous ceux qui redoutent le cancer. En détectan...
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2022 September 26 All the Water on Planet Earth Illustration Credit: Jack Cook, Adam Nieman, Woods Hole Oceanographic Institution ; Data ...
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2024 September 7 Small Moon Deimos Image Credit: HiRISE , MRO , LPL (U. Arizona) , NASA Explanation: Mars has two tiny moons, Phobos a...