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13/05/2024
SANTé/MEDECINE - Anti-inflamatoires naturels - Le pin Sylvestre : un anti-inflamatoire respiratoire
NUCLEAIRE - Comment survivre à une explosion nucléaire ? - Quelle est la dangerosité d'une bombe nucléaire ?
ASTRONOMY - AR 3664 on a Setting Sun
Image Credit & Copyright: Marco Meniero
Explanation: It was larger than the Earth. It was so big you could actually see it on the Sun's surface without magnification. It contained powerful and tangled magnetic fields as well as numerous dark sunspots. Labelled AR 3664, it developed into one of the most energetic areas seen on the Sun in recent years, unleashing a series of explosions that led to a surge of energetic particles striking the Earth, which created beautiful auroras. And might continue. Although active regions on the Sun like AR 3664 can be quite dangerous, this region's Coronal Mass Ejections have not done, as yet, much damage to Earth-orbiting satellites or Earth-surface electrical grids. Pictured, the enormous active region was captured on the setting Sun a few days ago from Civitavecchia, Rome, Italy. The composite image includes a very short exposure taken of just the Sun's surface, but mimics what was actually visible. Finally, AR 3664 is now rotating away from the Earth, although the region may survive long enough to come around again.
12/05/2024
SANTé/MEDECINE - Homme ou animal qui est le plus fort ? - Marcher sur l'eau
ASTRONOMY - Red Aurora over Poland
2024 May 12
Image Credit & Copyright: Mariusz Durlej
Explanation: Northern lights don't usually reach this far south. Magnetic chaos in the Sun's huge Active Region 3664, however, produced a surface explosion that sent a burst of electrons, protons, and more massive, charged nuclei into the Solar System. A few days later, that coronal mass ejection (CME) impacted the Earth and triggered auroras that are being reported unusually far from our planet's north and south poles. The free sky show might not be over -- the sunspot rich AR3664 has ejected even more CMEs that might also impact the Earth tonight or tomorrow. That active region is now near the Sun's edge, though, and will soon be rotating away from the Earth. Pictured, a red and rayed aurora was captured in a single 6-second exposure from Racibórz, Poland early last night. The photographer's friend, seeing an aurora for the first time, is visible in the distance also taking images of the beautifully colorful nighttime sky.
NUCLéAIRE - Comment survivre à une explosion nucléaire ? - Experts et conseils
11/05/2024
SANTé/MEDECINE - Anti-inflamatoires naturels - Le cassis, un allié contre l'arthrose
SANTé/MEDECINE - Homme ou animal qui est le plus fort ? - Escalade
ASTRONOMY - AR 3664: Giant Sunspot Group
2024 May 11
Image Credit & Copyright: Franco Fantasia & Guiseppe Conzo (Gruppo Astrofili Palidoro)
Explanation: Right now, one of the largest sunspot groups in recent history is crossing the Sun. Active Region 3664 is not only big -- it's violent, throwing off clouds of particles into the Solar System. Some of these CMEs are already impacting the Earth, and others might follow. At the extreme, these solar storms could cause some Earth-orbiting satellites to malfunction, the Earth's atmosphere to slightly distort, and electrical power grids to surge. When impacting Earth's upper atmosphere, these particles can produce beautiful auroras, with some auroras already being reported unusually far south. Pictured here, AR3664 and its dark sunspots were captured yesterday in visible light from Rome, Italy. The AR3664 sunspot group is so large that it is visible just with glasses designed to view last month's total solar eclipse. This weekend, skygazing enthusiasts will be keenly watching the night skies all over the globe for bright and unusual auroras.
10/05/2024
SANTé/MEDECINE - Homme ou animal qui est le plus fort - Altitude
ASTRONOMIE - Galaxies - NGC 4414
Une galaxie spirale . (photo HST, APOD 09/09/1999)
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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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2021 January 3 A Phoenix Aurora over Iceland Image Credit & Copyright: Hallgrimur P. Helgason ; Rollover Annotation: Judy Schmidt Ex...