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02/12/2024
ASTRONOMIE - La Voie Lactée au Tyrol
ASTRONOMY - NGC 300: A Galaxy of Stars
2024 December 2
Image Credit & Copyright: Daniel Stern
Explanation: This galaxy is unusual for how many stars it seems that you can see. Stars are so abundantly evident in this deep exposure of the spiral galaxy NGC 300 because so many of these stars are bright blue and grouped into resolvable bright star clusters. Additionally, NGC 300 is so clear because it is one of the closest spiral galaxies to Earth, as light takes only about 6 million years to get here. Of course, galaxies are composed of many more faint stars than bright, and even more of a galaxy's mass is attributed to unseen dark matter. NGC 300 spans nearly the same amount of sky as the full moon and is visible with a small telescope toward the southern constellation of the Sculptor. The featured image was captured in October from Rio Hurtado, Chile and is a composite of over 20 hours of exposure.
01/12/2024
ASTRONOMIE - La Voie Lactée et les champs de lavande
30/11/2024
ASTRONOMY - Winter and Summer on a Little Planet
2024 November 30
Image Credit & Copyright: Camille Niel
Explanation: Winter and summer appear to come on a single night to this stunning little planet. It's planet Earth of course. The digitally mapped, nadir centered panorama covers 360x180 degrees and is composed of frames recorded during January and July from the Col du Galibier in the French Alps. Stars and nebulae of the northern winter (bottom) and summer Milky Way form the complete arcs traversing the rugged, curved horizon. Cars driving along on the road during a summer night illuminate the 2,642 meter high mountain pass, but snow makes access difficult during winter months except by serious ski touring. Cycling fans will recognize the Col du Galibier as one of the most famous climbs in planet Earth's Tour de France.
29/11/2024
ASTRONOMIE - La Voie Lactée au Cervin - Suisse
ASTRONOMY - Messier 4
2024 November 29
Image Credit & Copyright: Steve Crouch
Explanation: Messier 4 can be found west of bright red-giant star Antares, alpha star of the constellation Scorpius. M4 itself is only just visible from dark sky locations, even though the globular cluster of 100,000 stars or so is a mere 5,500 light-years away. Still, its proximity to prying telescopic eyes makes it a prime target for astronomical explorations. Recent studies have included Hubble observations of M4's pulsating cepheid variable stars, cooling white dwarf stars, and ancient, pulsar orbiting exoplanet PSR B1620-26 b. This sharp image was captured with a small telescope on planet Earth. At M4's estimated distance it spans about 50 light-years across the core of the globular star cluster.
28/11/2024
METEOROLOGIE - Vagues nuageuses en Republique Tchèque
ASTRONOMY - NGC 206 and the Star Clouds of Andromeda
2024 November 28
Image Credit & Copyright: Roberto Marinoni
Explanation: The large stellar association cataloged as NGC 206 is nestled within the dusty arms of the neighboring Andromeda galaxy along with the galaxy's pinkish star-forming regions. Also known as M31, the spiral galaxy is a mere 2.5 million light-years away. NGC 206 is found at the center of this sharp and detailed close-up of the southwestern extent of Andromeda's disk. The bright, blue stars of NGC 206 indicate its youth. In fact, its youngest massive stars are less than 10 million years old. Much larger than the open or galactic clusters of young stars in the disk of our Milky Way galaxy, NGC 206 spans about 4,000 light-years. That's comparable in size to the giant stellar nurseries NGC 604 in nearby spiral M33 and the Tarantula Nebula in the Large Magellanic Cloud.
27/11/2024
METEOROLOGIE - Arcus sur l'île de Pag en Croatie.
LA TERRE VUE DU CIEL - Le triangle Turin - Marseille - Lyon
Cette image a été acquise alors que la Station spatiale survolait la frontière entre la Belgique et la France. Elle montre le triangle form...
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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 February 17 SpaceX Rocket Launch Plume over California Image Credit & Copyright: Martin LaMontagne Explanation: What's happe...