Nombre total de pages vues
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
SANTé/MEDECINE - Anti-inflamatoires naturels - L'écorce de saule blanc : une aspirine végétale
ASTRONOMY - Simulation: Two Black Holes Merge
2024 May 10
Simulation Credit: Simulating eXtreme Spacetimes Project
Explanation: Relax and watch two black holes merge. Inspired by the first direct detection of gravitational waves in 2015, this simulation plays in slow motion but would take about one third of a second if run in real time. Set on a cosmic stage, the black holes are posed in front of stars, gas, and dust. Their extreme gravity lenses the light from behind them into Einstein rings as they spiral closer and finally merge into one. The otherwise invisible gravitational waves generated as the massive objects rapidly coalesce cause the visible image to ripple and slosh both inside and outside the Einstein rings even after the black holes have merged. Dubbed GW150914, the gravitational waves detected by LIGO are consistent with the merger of 36 and 31 solar mass black holes at a distance of 1.3 billion light-years. The final, single black hole has 63 times the mass of the Sun, with the remaining 3 solar masses converted into energy radiated in gravitational waves.
09/05/2024
SANTé/MEDECINE - Homme ou animal qui est le plus fort ? - Apnée
SANTé/MEDECINE - Anti-inflamatoires naturels Le basilic : un anti-inflammatoire digestif
ASTRONOMY - The Galaxy, the Jet, and a Famous Black Hole
2024 May 9
Image Credit: NASA, JPL-Caltech, Event Horizon Telescope Collaboration
Explanation: Bright elliptical galaxy Messier 87 (M87) is home to the supermassive black hole captured in 2017 by planet Earth's Event Horizon Telescope in the first ever image of a black hole. Giant of the Virgo galaxy cluster about 55 million light-years away, M87 is rendered in blue hues in this infrared image from the Spitzer Space telescope. Though M87 appears mostly featureless and cloud-like, the Spitzer image does record details of relativistic jets blasting from the galaxy's central region. Shown in the inset at top right, the jets themselves span thousands of light-years. The brighter jet seen on the right is approaching and close to our line of sight. Opposite, the shock created by the otherwise unseen receding jet lights up a fainter arc of material. Inset at bottom right, the historic black hole image is shown in context at the center of giant galaxy, between the relativistic jets. Completely unresolved in the Spitzer image, the supermassive black hole surrounded by infalling material is the source of enormous energy driving the relativistic jets from the center of active galaxy M87. The Event Horizon Telescope image of M87 has been enhanced to reveal a sharper view of the famous supermassive black hole.
08/05/2024
SANTé/MEDECINE - Homme ou animal qui est le plus fort ? - Vitesse de nage
ASTRONOMY - WISPIT 2b: Exoplanet Carves Gap in Birth Disk
2025 August 27 WISPIT 2b: Exoplanet Carves Gap in Birth Disk Image Credit: ESO , VLT , SPHERE ; Processing & Copyright: ESO , Rich...

-
2022 September 26 All the Water on Planet Earth Illustration Credit: Jack Cook, Adam Nieman, Woods Hole Oceanographic Institution ; Data ...
-
2025 January 14 North Star: Polaris and Surrounding Dust Image Credit & Copyright: Davide Coverta Explanation: Why is Polaris called ...