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19/07/2025
SANTé/MEDECINE - Cancer du foie : les personnes les plus à risque (2/6)
18/07/2025
SANTé/MEDECINE - Cancer du foie : les personnes les plus à risque (1/6)
ASTRONOMY - ISS Meets Saturn
2025 July 18
Image Credit & Copyright: A.J. Smadi
Explanation: This month, bright planet Saturn rises in evening skies, its rings oriented nearly edge-on when viewed from planet Earth. And in the early morning hours on July 6, it posed very briefly with the International Space Station when viewed from a location in Federal Way, Washington, USA. This well-planned image, a stack of video frames, captures their momentary conjunction in the same telescopic field of view. With the ISS in low Earth orbit, space station and gas giant planet were separated by almost 1.4 billion kilometers. Their apparent sizes are comparable but the ISS was much brighter than Saturn and the ringed planet's brightness has been increased for visibility in the stacked image. Precise timing and an exact location were needed to capture the ISS/Saturn conjunction.
17/07/2025
LA TERRE VUE DU CIEL - Chicago vue depuis l'ISS
SANTé/MEDECINE - Détecter le cancer dans les analyses de sang - (7/7) - Conclusion : Un avenir plein d’espoir
ASTRONOMY - 3I/ATLAS
Image Credit: Gemini Observatory/NOIRLab/NSF/AURA/K. Meech (IfA/U. Hawaii)
Processing: Jen Miller, Mahdi Zamani (NSF/NOIRLab)
Explanation: Discovered on July 1 with the NASA-funded ATLAS (Asteroid Terrestrial-impact Last Alert, System) survey telescope in Rio Hurtado, Chile, 3I/ATLAS is so designated as the third known interstellar object to pass through our Solar System It follows 1I/ʻOumuamua in 2017 and the comet 2I/Borisov in 2019. Also known as C/2025 N1, 3I/ATLAS is clearly a comet, its diffuse cometary coma, a cloud of gas and dust surrounding an icy nucleus, is easily seen in these images from the large Gemini North telescope on Maunakea, Hawai‘i. The left panel tracks the comet as it moves across the sky against fixed background stars in successive exposures. Three different filters were used, shown in red, green, and blue. In the right panel the multiple exposures are registered and combined to form a single image of the comet. The comet's interstellar origin is also clear from its orbit, determined to be an eccentric, highly hyperbolic orbit that does not loop back around the Sun and will return 3I/ATLAS to interstellar space. Not a threat to planet Earth, the inbound interstellar interloper is now within the Jupiter's orbital distance of the Sun, while its closest approach to the Sun will bring it just within the orbital distance of Mars.
16/07/2025
LA TERRE VUE DU CIEL - Nuages vus de l'ISS
SANTé/MEDECINE - Détecter le cancer dans les analyses de sang - (6) - Les défis à relever pour un accès universel
ASTRONOMY - The Rosette Nebula from DECam
2025 July 16
Image Credit: CTIO, NOIRLab, DOE, NSF, AURA; Processing: T. A. Rector (U. Alaska Anchorage), D. de Martin (NSF’s NOIRLab) & M. Zamani
Explanation: Would the Rosette Nebula by any other name look as sweet? The bland New General Catalog designation of NGC 2237 doesn't appear to diminish the appearance of this flowery emission nebula, as captured by the Dark Energy Camera (DECam) on the Blanco 4-meter telescope at the NSF's Cerro Tololo Inter-American Observatory in Chile. Inside the nebula lies an open cluster of bright young stars designated NGC 2244. These stars formed about four million years ago from the nebular material and their stellar winds are clearing a hole in the nebula's center, insulated by a layer of dust and hot gas. Ultraviolet light from the hot cluster stars causes the surrounding nebula to glow. The Rosette Nebula spans about 100 light-years across, lies about 5000 light-years away, and can be seen with a small telescope towards the constellation of the Unicorn (Monoceros).
15/07/2025
NUCLEAIRE - Rejets de tritium dans votre commune
- Hérault
- Ille-et-Vilaine
- Indre
- Indre-et-Loire
- Isère
- Jura
- Landes
- Loir-et-Cher
- Loire
- Haute-Loire
- Loire-Atlantique
- Loiret
- Lot
- Lot-et-Garonne
- Lozère
- Maine-et-Loire
- Manche
- Marne
- Haute-Marne
- Mayenne
- Meurthe-et-Moselle
- Meuse
- Morbihan
- Moselle
- Nièvre
- Nord
- Oise
- Orne
- Pas-de-Calais
- Puy-de-Dôme
- Pyrénées-Atlantiques
- Hautes-Pyrénées
- Pyrénées-Orientales
- Bas-Rhin
- Haut-Rhin
- Rhône
- Haute-Saône
- Saône-et-Loire
- Sarthe
- Savoie
- Haute-Savoie
- Paris
- Seine-Maritime
- Seine-et-Marne
- Yvelines
- Deux-Sèvres
- Somme
- Tarn
- Tarn-et-Garonne
- Var
- Vaucluse
- Vendée
- Vienne
- Haute-Vienne
- Vosges
- Yonne
- Territoire de Belfort
- Essonne
- Hauts-de-Seine
- Seine-St-Denis
- Val-de-Marne
- Val-D’Oise
- DROM-COM : Guadeloupe, Martinique, Guyane, Réunion, Mayotte, St-Barthélemy, St-Martin
ASTRONOMY - Perseids from Perseus
2025 August 12 Perseids from Perseus Image Credit & Copyright: Marcin Rosadziński Explanation: Where are all of these meteors coming ...

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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 January 14 North Star: Polaris and Surrounding Dust Image Credit & Copyright: Davide Coverta Explanation: Why is Polaris called ...