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05/05/2024
SANTé/MEDECINE - Anti-inflamatoires naturels - La lavande : idéale en cas d'otite
SANTé/MEDECINE - Remèdes naturels - Aphtes
ASTRONOMY - A Black Hole Disrupts a Passing Star
2024 May 5
Illustration Credit: NASA, JPL-Caltech
Explanation: What happens to a star that goes near a black hole? If the star directly impacts a massive black hole, then the star falls in completely -- and everything vanishes. More likely, though, the star goes close enough to have the black hole's gravity pull away its outer layers, or disrupt, the star. Then, most of the star's gas does not fall into the black hole. These stellar tidal disruption events can be as bright as a supernova, and an increasing amount of them are being discovered by automated sky surveys. In the featured artist's illustration, a star has just passed a massive black hole and sheds gas that continues to orbit. The inner edge of a disk of gas and dust surrounding the black hole is heated by the disruption event and may glow long after the star is gone.
04/05/2024
SANTé/MEDECINE - Remèdes naturels - Perte de poids
SANTé/MEDECINE - Homme ou animal qui est le plus fort ? - Gestation
ASTRONOMY - 3 ATs
2024 May 4
Image Credit & Copyright: Yuri Beletsky (Carnegie Las Campanas Observatory, TWAN)
Explanation: Despite their resemblance to R2D2, these three are not the droids you're looking for. Instead, the enclosures house 1.8 meter Auxiliary Telescopes (ATs) at Paranal Observatory in the Atacama Desert region of Chile. The ATs are designed to be used for interferometry, a technique for achieving extremely high resolution observations, in concert with the observatory's 8 meter Very Large Telescope units. A total of four ATs are operational, each fitted with a transporter that moves the telescope along a track allowing different arrays with the large unit telescopes. To work as an interferometer, the light from each telescope is brought to a common focal point by a system of mirrors in underground tunnels. Above these three ATs, the Large and Small Magellanic Clouds are the far, far away satellite galaxies of our own Milky Way. In the clear and otherwise dark southern skies, planet Earth's greenish atmospheric airglow stretches faintly along the horizon.
03/05/2024
SANTé/MEDECINE - Remèdes naturels - La nausée
SANTé/MEDECINE - Homme ou animal qui est le plus fort ? - Saut en longueur
ASTRONOMY - Temperatures on Exoplanet WASP-43b
2024 May 3
Illustration Credit: NASA, ESA, CSA, Ralf Crawford (STScI)
Science: Taylor Bell (BAERI), Joanna Barstow (The Open University), Michael Roman (University of Leicester)
Explanation: A mere 280 light-years from Earth, tidally locked, Jupiter-sized exoplanet WASP-43b orbits its parent star once every 0.8 Earth days. That puts it about 2 million kilometers (less than 1/25th the orbital distance of Mercury) from a small, cool sun. Still, on a dayside always facing its parent star, temperatures approach a torrid 2,500 degrees F as measured at infrared wavelengths by the MIRI instrument on board the James Webb Space Telescope. In this illustration of the hot exoplanet's orbit, Webb measurements also show nightside temperatures remain above 1,000 degrees F. That suggests that strong equatorial winds circulate the dayside atmospheric gases to the nightside before they can completely cool off. Exoplanet WASP-43b is now formally known as Astrolábos, and its K-type parent star has been christened Gnomon. Webb's infrared spectra indicate water vapor is present on the nightside as well as the dayside of the planet, providing information about cloud cover on Astrolábos.
02/05/2024
SANTé/MEDECINE - Remèdes naturels - Rhume et grippe
ASTRONOMY - Galaxies Stars and Dust
2025 August 28 Galaxies, Stars, and Dust Image Credit & Copyright : Robert Eder Explanation: This well-composed telescopic field o...

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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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2024 December 3 Ice Clouds over a Red Planet Image Credit: NASA , JPL-Caltech , Kevin M. Gill ; Processing: Rogelio Bernal Andreo Expla...