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07/09/2025
ASTRONOMIE - Un phénomène astronomique exceptionnel illuminera la nuit de rouge ce soir
06/09/2025
ASTRONOMIE - L’éclipse totale de Lune du 7 septembre 2025
Une éclipse totale… pas totalement visible
Que verra-t-on en France métropolitaine et dans les pays voisins ?
Un lever de lune fantomatique
- non seulement elle sera éclairée par une lumière rouge sombre caractéristique des éclipses (quelques rayons de lumière du Soleil lui parviennent après avoir été filtrés et réfractés, c’est-à-dire déviés, par l’atmosphère terrestre) ;
- mais aussi, nous la verrons à travers une épaisse couche d’air qui a toujours tendance à rendre rougeoyants les astres à leur lever ou à leur coucher (phénomène d’absorption, toujours cet effet de filtre).
NUCLEAIRE - Carte « L’industrie nucléaire en France »
CRIIRAD
ASTRONOMY - Sardinia Sunset
2025 September 6
Image Credit & Copyright: Lorenzo Busilacchi
Explanation: When the sun sets on September 7, the Full Moon will rise. And on that date denizens around much of our fair planet, including parts of Antarctica, Australia, Asia, Europe, and Africa can witness a total lunar eclipse, with the Moon completely immersed in Earth's shadow. As the bright Full Moon first enters Earth's shadow it will darken, finally taking on a reddish hue during the total eclipse phase. In fact, the color of the Moon during a total lunar eclipse is due to reddened light from sunrises and sunsets around planet Earth. The reddened sunlight is scattered by a dense atmosphere into the planet's otherwise dark central shadow. When the sun set on August 22, this telephoto snapshot of red skies, blue sea, and the Mangiabarche Lighthouse was captured from Sant'Antioco, Sardinia, Italy.
05/09/2025
SANTé/MEDECINE - GUERISON DU CANCER - Un espoir immense - Conclusion -7/7-
ASTRONOMY - 47 Tucanae: Globular Star Cluster
2025 September 5
Image Credit & Copyright: Carlos Taylor
Explanation: Also known as NGC 104, 47 Tucanae is a jewel of the southern sky. Not a star but a dense cluster of stars, it roams the halo of our Milky Way Galaxy along with some 200 other globular star clusters. The second brightest globular cluster (after Omega Centauri) as seen from planet Earth, 47 Tuc lies about 13,000 light-years away. It can be spotted with the naked eye close on the sky to the Small Magellanic Cloud in the constellation of the Toucan. The dense cluster is made up of hundreds of thousands of stars in a volume only about 120 light-years across. Red giant stars on the outskirts of the cluster are easy to pick out as yellowish stars in this sharp telescopic portrait. Tightly packed globular star cluster 47 Tuc is also home to a star with the closest known orbit around a black hole.
04/09/2025
SANTé/MEDECINE - GUERISON DU CANCER - Un espoir immense - La reprogrammation des cellules cancéreuses -6/7-
03/09/2025
ASTRONOMY - Cir X-1: Jets in the Africa Nebula
2025 September 3
Image Credit: J. English (U. Manitoba) & K. Gasealahwe (U. Cape Town), SARAO, MeerKAT, ThunderKAT; Science: K. Gasealahwe, K. Savard (U. Oxford) et al.; Text: J. English & K. Savard
Explanation: How soon do jets form when a supernova gives birth to a neutron star? The Africa Nebula provides clues. This supernova remnant surrounds Circinus X-1, an X-ray emitting neutron star and the companion star it orbits. The image, from the ThunderKAT collaboration on the MeerKAT radio telescope situated in South Africa, shows the bright core-and-lobe structure of Cir X-1’s currently active jets inside the nebula. A mere 4600 years old, Cir X-1 could be the "Little Sister" of microquasar SS 433*. However, the newly discovered bubble exiting from a ring-like hole in the upper right of the nebula, along with a ring to the bottom left, demonstrate that other jets previously existed. Computer simulations indicate those jets formed within 100 years of the explosion and lasted up to 1000 years. Surprisingly, to create the observed bubble, the jets need to be more powerful than young neutron stars were previously thought to produce.
02/09/2025
ASTRONOMY - The Horsehead and Flame Nebulas
2025 September 2
Image Credit & Copyright: Daniel Stern
Explanation: The Horsehead Nebula is one of the most famous nebulae on the sky. It is visible as the dark indentation to the orange emission nebula at the far right of the featured picture. The horse-head feature is dark because it is really an opaque dust cloud that lies in front of the bright emission nebula. Like clouds in Earth's atmosphere, this cosmic cloud has assumed a recognizable shape by chance. After many thousands of years, the internal motions of the cloud will surely alter its appearance. The emission nebula's orange color is caused by electrons recombining with protons to form hydrogen atoms. Toward the lower left of the image is the Flame Nebula, an orange-tinged nebula that also contains intricate filaments of dark dust.
01/09/2025
ASTRONOMY - Callisto: Dirty Battered Iceball
Image Credit: NASA, JPL-Caltech, Voyager 2; Processing & License: Kevin M. Gill;
Explanation: Its surface is the most densely cratered in the Solar System -- but what's inside? Jupiter's moon Callisto is a battered ball of dirty ice that is larger than the planet Mercury. It was visited by NASA's Galileo spacecraft in the 1990s and 2000s, but the recently reprocessed featured image is from a flyby of NASA's Voyager 2 in 1979. The moon would appear darker if it weren't for the tapestry of light-colored fractured surface ice created by eons of impacts. The interior of Callisto is potentially even more interesting because therein might lie an internal layer of liquid water. This potential underground sea is a candidate to harbor life -- similar with sister moons Europa and Ganymede. Callisto is slightly larger than Luna, Earth's Moon, but because of its high ice content is slightly less massive. ESA's JUICE and NASA's Europa Clipper missions are now headed out to Jupiter to better investigate its largest moons.
ASTRONOMY - Star Trails over One-Mile Radio Telescope
2025 September 13 Star Trails over One-Mile Radio Telescope Image Credit & Copyright : Joao Yordanov Serralheiro Explanation: The s...

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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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2021 August 11 Mammatus Clouds over Saskatchewan Image Credit & Copyright: Michael F Johnston Explanation: When do cloud bottoms appe...