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28/06/2024
SANTé/MEDECINE - L'immortalité pour bientôt - Tout est donc dans la tête ?
SANTé/MEDECINE - Anatomie du coeur humain - Coeur droit
ASTRONOMY - Comet 13P/Olbers
2024 June 28
Image Credit & Copyright: Dan Bartlett`
Explanation: Not a paradox, Comet 13P/Olbers is returning to the inner Solar System after 68 years. The periodic, Halley-type comet will reach its next perihelion or closest approach to the Sun on June 30 and has become a target for binocular viewing low in planet Earth's northern hemisphere night skies. But this sharp telescopic image of 13P is composed of stacked exposures made on the night of June 25. It easily reveals shifting details in the bright comet's torn and tattered ion tail buffeted by the wind from an active Sun, along with a broad, fanned-out dust tail and slightly greenish coma. The frame spans over two degrees across a background of faint stars toward the constellation Lynx.
27/06/2024
ASTRONOMY - Protostellar Outflows in Serpens
2024 June 27
Image Credit: NASA, ESA, CSA, STScI, Klaus Pontoppidan (NASA-JPL), Joel Green (STScI)
Explanation: Jets of material blasting from newborn stars, are captured in this James Webb Space Telescope close-up of the Serpens Nebula. The powerful protostellar outflows are bipolar, twin jets spewing in opposite directions. Their directions are perpendicular to accretion disks formed around the spinning, collapsing stellar infants. In the NIRcam image, the reddish color represents emission from molecular hydrogen and carbon monoxide produced as the jets collide with the surrounding gas and dust. The sharp image shows for the first time that individual outflows detected in the Serpens Nebula are generally aligned along the same direction. That result was expected, but has only now come into clear view with Webb's detailed exploration of the active young star-forming region. Brighter foreground stars exhibit Webb's characteristic diffraction spikes. At the Serpens Nebula's estimated distance of 1,300 light-years, this cosmic close-up frame is about 1 light-year across.
26/06/2024
SANTé/MEDECINE - Anatomie du coeur humain - Infarctus dans le ventricule gauche
SANTé/MEDECINE - L'immortalité pour bientôt - Télécharger son cerveau
ASTRONOMY - Timelapse: Aurora SAR and the Milky Way
2024 June 26
Video Credit & Copyright: Jeff Dai (TWAN); Music (License): Suite bergamasque by Claude Debussy
Explanation: What's happening in the sky this unusual night? Most striking in the featured 4.5-hour 360-degree panoramic video, perhaps, is the pink and purple aurora. That's because this night, encompassing May 11, was famous for its auroral skies around the world. As the night progresses, auroral bands shimmer, the central band of our Milky Way Galaxy rises, and stars shift as the Earth rotates beneath them. Captured here simultaneously is a rare red band running above the aurora: a SAR arc, seen to change only slightly. The flashing below the horizon is caused by passing cars, while the moving spots in the sky are satellites and airplanes. The featured video was captured from Xinjiang, China with four separate cameras.
25/06/2024
SANTé/MEDECINE - Anatomie du coeur humain - Vue de la valve tricuspide
ASTRONOMY - Methane Bubbles Frozen in Lake Baikal
2024 December 29 Methane Bubbles Frozen in Lake Baikal Image Credit & Copyright: Kristina Makeeva Explanation: What are these bubbles...
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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...