Nombre total de pages vues
02/11/2023
ASTRONOMIE - Vénus et la Lune ensemble pour un magnifique rapprochement suivi d’une occultation
METEO EXTREME - Tempête Ciaran: une vague de 21 mètres mesurée au large du Finistère
MACROPHOTOGRAPHIE - Un flocon de neige
SANTE/MEDECINE - L'Egypte antique et la momification
© Dada by-sa 3.0
01/11/2023
METEO EXTREME - Tempête Ciaran en ce moment
METEO EXTREME - La tempête Ciaran est une bombe météorologique
ASTRONOMY - Annular Solar Eclipse over Utah
023 November 1
Image Credit & Copyright: MaryBeth Kiczenski
Explanation: Part of the Sun disappeared earlier this month, but few people were worried. The missing part, which included the center from some locations, just went behind the Moon in what is known as an annular solar eclipse. Featured here is an eclipse sequence taken as the Moon was overtaking the rising Sun in the sky. The foreground hill is Factory Butte in Utah, USA. The rays flaring out from the Sun are not real -- they result from camera aperture diffraction and are known as sunstar. The Moon is real, but it is artificially brightened to enhance its outline -- which helps the viewer better visualize the Moon's changing position during this ring-of-fire eclipse. As stunning as this eclipse sequence is, it was considered just practice by the astrophotographer. The reason? She hopes to use this experience to better photograph the total solar eclipse that will occur over North America on April 8, 2024.
31/10/2023
ASTRONOMY - Halloween and the Wizard Nebula
2023 October 31
Image Credit & Copyright: Richard McInnis
Explanation: Halloween's origin is ancient and astronomical. Since the fifth century BC, Halloween has been celebrated as a cross-quarter day, a day halfway between an equinox (equal day / equal night) and a solstice (minimum day / maximum night in the northern hemisphere). With a modern calendar however, even though Halloween occurs today, the real cross-quarter day will occur next week. Another cross-quarter day is Groundhog Day. Halloween's modern celebration retains historic roots in dressing to scare away the spirits of the dead. Perhaps a fitting tribute to this ancient holiday is this closeup view of the Wizard Nebula (NGC 7380). Visually, the interplay of stars, gas, and dust has created a shape that appears to some like a fictional ancient sorcerer. Although the nebula may last only a few million years, some of the stars being conjured from the gas by the great gravitational powers may outlive our Sun.
30/10/2023
SANTE/MEDECINE - Pli dans le lobe de l'oreille
ASTRONOMY - Reflections of the Ghost Nebula
2023 October 30
Image Credit & Copyright: Bogdan Jarzyna
Explanation: Do any shapes seem to jump out at you from this interstellar field of stars and dust? The jeweled expanse, filled with faint, starlight-reflecting clouds, drifts through the night in the royal constellation of Cepheus. Far from your own neighborhood on planet Earth, these ghostly apparitions lurk along the plane of the Milky Way at the edge of the Cepheus Flare molecular cloud complex some 1,200 light-years away. Over two light-years across and brighter than the other spooky chimeras, VdB 141 or Sh2-136 is also known as the Ghost Nebula, seen toward the bottom of the featured image. Within the reflection nebula are the telltale signs of dense cores collapsing in the early stages of star formation.
ASTRONOMY - Fox Fur, Cone, and Christmas Tree
2024 December 24 Fox Fur, Cone, and Christmas Tree Image Credit & Copyright: Tim White Explanation: What do the following things have...
-
2021 May 11 Lightning and Orion Beyond Uluru Image Credit & Copyright: Park Liu Explanation: What's happening behind Uluru? A Un...
-
Extraordinary Solar Halos Image Credit & Copyright : Magnus Edback Explanation: Welcome to the December Solstice, the first...