Nombre total de pages vues
20/06/2024
CREATURES DES ABYSSES - Les donzelles
SANTé/MEDECINE - L'immortalité pour bientôt - L'univers peut lui aussi mourir
ASTRONOMY - Sandy and the Moon Halo
2024 June 20
Image Credit & Copyright: Marcella Giulia Pace
Explanation: Last April's Full Moon shines through high clouds near the horizon, casting shadows in this garden-at-night skyscape. Along with canine sentinel Sandy watching the garden gate, the wide-angle snapshot also captured the bright Moon's 22 degree ice halo. But June's bright Full Moon will cast shadows too. This month, the Moon's exact full phase occurs at 01:08 UTC June 22. That's a mere 28 hours or so after today's June solstice (at 20:51 UTC June 20), the moment when the Sun reaches its maximum northern declination. Known to some as a Strawberry Moon, June's Full Moon is at its southernmost declination, and of course will create its own 22 degree halos in hazy night skies.
19/06/2024
SANTé/MEDECINE - L'anatomie du coeur humain - Coupe dans le ventricule gauche
ASTRONOMY - NGC 6188: Dragons of Ara
2024 June 19
Image Credit & Copyright: Carlos Taylor
Explanation: Do dragons fight on the altar of the sky? Although it might appear that way, these dragons are illusions made of thin gas and dust. The emission nebula NGC 6188, home to the glowing clouds, is found about 4,000 light years away near the edge of a large molecular cloud, unseen at visible wavelengths, in the southern constellation Ara (the Altar). Massive, young stars of the embedded Ara OB1 association were formed in that region only a few million years ago, sculpting the dark shapes and powering the nebular glow with stellar winds and intense ultraviolet radiation. The recent star formation itself was likely triggered by winds and supernova explosions from previous generations of massive stars, that swept up and compressed the molecular gas. This impressively detailed image spans over 2 degrees (four full Moons), corresponding to over 150 light years at the estimated distance of NGC 6188.
18/06/2024
SANTé/MEDECINE - L'anatomie du coeur humain
SANTé/MEDECINE - L'immortalité pour bientôt - L'entropie
ASTRONOMY - Gigantic Jets over Himalayan Mountains
2024 June 18
Image Credit & Copyright: Li Xuanhua
Explanation: Yes, but can your thunderstorm do this? Pictured here are gigantic jets shooting up from a thunderstorm last week toward the Himalayan Mountains in China and Bhutan. The composite image captured four long jets that occurred only minutes apart. Gigantic jets, documented only in this century, are a type of lightning discharge that occurs between some thunderstorms and the Earth's ionosphere high above them. They are an unusual type of lightning that is much different from regular cloud-to-cloud and cloud-to-ground lightning. The bottoms of gigantic jets appear similar to a cloud-to-above strike called blue jets, while the tops appear similar to upper-atmosphere red sprites. Although the mechanism and trigger that cause gigantic jets remains a topic of research, it is clear that the jets reduce charge imbalance between different parts of Earth's atmosphere. A good way to look for gigantic jets is to watch a powerful but distant thunderstorm from a clear location.
Astronomy - THE RED GLOW OF THE COSMIC BAT NEBULA
2026 July 9 The Red Glow of the Cosmic Bat Nebula Image Credit & Copyright: Humbert Cédric Text: Keighley Rockcliffe ( NASA GSFC , U...
-
2026 January 1 Auroral Corona Image Credit & Copyright : Roi Levi Explanation: Cycle 25 solar maximum made 2025 a great year for ...
-
2026 January 2 NanoSail-D2 Image Credit & Copyright : Ralf Vandebergh Explanation: In 2011, on January 20, NASA's NanoSail-D2 ...


