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03/06/2024
NUCLEAIRE - Comment survivre à une explosion nucléaire ? Restez confiné pendant 24 heures
ASTRONOMY - NGC 2403 in Camelopardalis
2024 June 3
Image Credit & Copyright: (Team F.A.C.T.) Lilian Lbt - Cyrille Malo - Maxime Martin - Clément Daniel - Paul Grasset - Louis Leroux-Géré
Explanation: Magnificent island universe NGC 2403 stands within the boundaries of the long-necked constellation Camelopardalis. Some 10 million light-years distant and about 50,000 light-years across, the spiral galaxy also seems to have more than its fair share of giant star forming HII regions, marked by the telltale reddish glow of atomic hydrogen gas. The giant HII regions are energized by clusters of hot, massive stars that explode as bright supernovae at the end of their short and furious lives. A member of the M81 group of galaxies, NGC 2403 closely resembles a galaxy in our own local galaxy group with an abundance of star forming regions, M33, the Triangulum Galaxy. Spiky in appearance, bright stars in this portrait of NGC 2403 are in the foreground, within our own Milky Way. Also in the foreground of the deep, wide-field, telescopic image are the Milky Way's dim and dusty interstellar clouds also known as galactic cirrus or integrated flux nebulae. But faint features that seem to extend from NGC 2403 itself are likely tidal stellar streams drawn out by gravitational interactions with neighboring galaxies.
02/06/2024
SANTé/MEDECINE - Virus et bactéries mortels - Le virus de la grippe espagnole cette épidémie ravageuse de 1918
NUCLEAIRE - Comment survivre à une explosion nucléaire ? Consommez uniquement des aliments sous emballage
ASTRONOMY - Rotating Moon from LRO
2024 June 2
Video Credit: NASA, LRO, Arizona State U.
Explanation: No one, presently, sees the Moon rotate like this. That's because the Earth's moon is tidally locked to the Earth, showing us only one side. Given modern digital technology, however, combined with many detailed images returned by the Lunar Reconnaissance Orbiter (LRO), a high resolution virtual Moon rotation movie has been composed. The featured time-lapse video starts with the standard Earth view of the Moon. Quickly, though, Mare Orientale, a large crater with a dark center that is difficult to see from the Earth, rotates into view just below the equator. From an entire lunar month condensed into 24 seconds, the video clearly shows that the Earth side of the Moon contains an abundance of dark lunar maria, while the lunar far side is dominated by bright lunar highlands. Currently, over 32 new missions to the Moon are under active development from multiple countries and companies, including NASA's Artemis program which aims to land people on the Moon again within the next few years.
01/06/2024
SANTé/MEDECINE - Virus et bactéries mortels - Le virus de la dengue gagne du terrain
NUCLEAIRE - Comment survivre à une explosion nucléaire - Nettoyage : n'oubliez aucun recoin ni les animaux domestiques
ASTRONOMY - Stereo Helene
2024 June 1
Image Credit: Cassini Imaging Team, ISS, JPL, ESA, NASA; Stereo Image by Roberto Beltramini
Explanation: Get out your red/blue glasses and float next to Helene, small, icy moon of Saturn. Appropriately named, Helene is a Trojan moon, so called because it orbits at a Lagrange point. A Lagrange point is a gravitationally stable position near two massive bodies, in this case Saturn and larger moon Dione. In fact, irregularly shaped ( about 36 by 32 by 30 kilometers) Helene orbits at Dione's leading Lagrange point while brotherly ice moon Polydeuces follows at Dione's trailing Lagrange point. The sharp stereo anaglyph was constructed from two Cassini images captured during a close flyby in 2011. It shows part of the Saturn-facing hemisphere of Helene mottled with craters and gully-like features.
31/05/2024
SANTé/MEDECINE - Virus et bactéries mortels - Les hantavirus et leur terrible syndrome pulmonaire
NUCLEAIRE - Comment survivre à une explosion nucléaire ? - N'utilisez aucun produit cosmétique
ASTRONOMY - Christmas Tree Aurora
2024 December 23 Christmas Tree Aurora Image Credit & Copyright: Jingyi Zhang Explanation: It was December and the sky lit up like a ...
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2021 May 11 Lightning and Orion Beyond Uluru Image Credit & Copyright: Park Liu Explanation: What's happening behind Uluru? A Un...
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Extraordinary Solar Halos Image Credit & Copyright : Magnus Edback Explanation: Welcome to the December Solstice, the first...