Nombre total de pages vues
14/05/2024
SANTé/MEDECINE - Anti-inflamatoires naturels - La camomille, en collyre contre la conjonctivite
NUCLEAIRE - Comment survivre à une explosion nucléaire - Qu'est-ce qu'une explosion nucléaire ?
ASTRONOMY - The 37 Cluster
2024 May 14
Image Credit & Copyright: Sergio Eguivar
Explanation: For the mostly harmless denizens of planet Earth, the brighter stars of open cluster NGC 2169 seem to form a cosmic 37. Did you expect 42? From our perspective, the improbable numerical asterism appears solely by chance. It lies at an estimated distance of 3,300 light-years toward the constellation Orion. As far as galactic or open star clusters go, NGC 2169 is a small one, spanning about 7 light-years. Formed at the same time from the same cloud of dust and gas, the stars of NGC 2169 are only about 11 million years old. Such clusters are expected to disperse over time as they encounter other stars, interstellar clouds, and experience gravitational tides while hitchhiking through the galaxy. Over four billion years ago, our own Sun was likely formed in a similar open cluster of stars.
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
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...