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13/07/2025
LA TERRE VUE DU CIEL - Brasilia - Capitale du Brésil
SANTé/MEDECINE - Comment soulager une piqûre de moustique en 1 minute
ASTRONOMY - Planetary Nebula Mz3: The Ant Nebula
2025 July 13
Image Credit: NASA, ESA, R. Sahai (JPL) et al., Hubble Heritage Team
Explanation: Why isn't this ant a big sphere? Planetary nebula Mz3 is being cast off by a star similar to our Sun that is, surely, round. Why then would the gas that is streaming away create an ant-shaped nebula that is distinctly not round? Clues might include the high 1000-kilometer per second speed of the expelled gas, the light-year long length of the structure, and the magnetism of the star featured here at the nebula's center. One possible answer is that Mz3 is hiding a second, dimmer star that orbits close in to the bright star. A competing hypothesis holds that the central star's own spin and magnetic field are channeling the gas. Since the central star appears to be so similar to our own Sun, astronomers hope that increased understanding of the history of this giant space ant can provide useful insight into the likely future of our own Sun and Earth.
12/07/2025
ASTRONOMY - Clouds and the Golden Moon
Image Credit & Copyright: Alexsandro Mota
Explanation: As the Sun set, a bright Full Moon rose on July 10. Its golden light illuminates clouds drifting through southern hemisphere skies in this well-composed telephoto image from Conceição do Coité, Bahia, Brazil. The brightest lunar phase is captured here with both a short and long exposure. The two exposures were combined to reveal details of the lunar surface in bright moonlight and a subtle iridescence along the dramatically backlit cloudscape. Of course, July's Full Moon is a winter moon in the southern hemisphere. But in the north it's known to some as the Thunder Moon, likely a nod to the sounds of this northern summer month's typically stormy weather.
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.
SANTé/MEDECINE - Tout savoir sur le coeur humain - 2 - Anatomie du cœur humain
Le cœur comprend quatre cavités : deux oreillettes , situées dans la partie supérieure, et deux ventricules , dans la partie inférieure du c...
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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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2025 May 11 The Surface of Venus from Venera 14 Image Credit: Soviet Planetary Exploration Program , Venera 14 ; Processing & Copyri...


