Nombre total de pages vues
19/10/2025
OCEANOGRAPHIE - Vagues scélérates - La vague Draupner ou Vague du Nouvel-An - 4/29 -
17/10/2025
ASTRONOMIE - Collisions avec la Terre - Meteor Crater (États-Unis)
ASTRONOMIE - Bénou - Équivalent à 22 bombes atomiques
16/10/2025
ASTRONOMY - Colorful Aurora over New Zealand
2024 October 16
Image Credit & Copyright: Tristian McDonald
Explanation: Sometimes the night sky is full of surprises. Take the sky over Lindis Pass, South Island, New Zealand one-night last week. Instead of a typically calm night sky filled with constant stars, a busy and dynamic night sky appeared. Suddenly visible were pervasive red aurora, green picket-fence aurora, a red SAR arc, a STEVE, a meteor, and the Moon. These outshone the center of our Milky Way Galaxy and both of its two satellite galaxies: the LMC and SMC. All of these were captured together on 28 exposures in five minutes, from which this panorama was composed. Auroras lit up many skies last week, as a Coronal Mass Ejection from the Sun unleashed a burst of particles toward our Earth that created colorful skies over latitudes usually too far from the Earth's poles to see them. More generally, night skies this month have other surprises, showing not only auroras -- but comets.
15/10/2025
SANTé/MEDECINE - La grossesse mois par mois - 8ème et 9ème mois
LES BELLES INVENTIONS DE LEONARD DE VINCI - Le char d'assaut
14/10/2025
SANTé/MEDECINE - La grossesse mois par mois - 6ème et 7ème mois
ASTRONOMY - Aurora Timelapse Over Italian Alps
2024 October 13
Video Credit & Copyright: Cristian Bigontina
Explanation: Did you see last night's aurora? This question was relevant around much of the world a few days ago because a powerful auroral storm became visible unusually far from the Earth's poles. The cause was a giant X-class solar flare on Tuesday that launched energetic electrons and protons into the Solar System, connecting to the Earth via our planet's magnetic field. A red glow of these particles striking oxygen atoms high in Earth's atmosphere pervades the frame, while vertical streaks dance. The featured video shows a one-hour timelapse as seen from Cortina d'Ampezzo over Alps Mountain peaks in northern Italy. Stars from our Milky Way Galaxy dot the background while streaks from airplanes and satellites punctuate the foreground. The high recent activity of our Sun is likely to continue to produce picturesque auroras over Earth during the next year or so.
10/10/2025
SANTé/MEDECINE - La grossesse mois par mois - 5ème mois
09/10/2025
ASTRONOMY - M106: A Spiral Galaxy with a Strange Center
2024 October 9
Image Credit & Copyright: Ali Al Obaidly
Explanation: What's happening at the center of spiral galaxy M106? A swirling disk of stars and gas, M106's appearance is dominated by blue spiral arms and red dust lanes near the nucleus, as shown in the featured image taken from the Kuwaiti desert. The core of M106 glows brightly in radio waves and X-rays where twin jets have been found running the length of the galaxy. An unusual central glow makes M106 one of the closest examples of the Seyfert class of galaxies, where vast amounts of glowing gas are thought to be falling into a central massive black hole. M106, also designated NGC 4258, is a relatively close 23.5 million light years away, spans 60 thousand light years across, and can be seen with a small telescope towards the constellation of the Hunting Dogs (Canes Venatici).
ASTRONOMY - Jupiter Abyss
2024 November 3 Jupiter Abyss Image Credit: NASA , Juno , SwRI , MSSS ; Processing & License : Gerald Eichstädt & Sean Dor...
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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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2025 May 11 The Surface of Venus from Venera 14 Image Credit: Soviet Planetary Exploration Program , Venera 14 ; Processing & Copyri...
 

