BIOMES - Canada

Au Canada, il y a aussi des forêts tempérées

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ASTRONOMY - Apollo 12 and Surveyor 3

 2024 November 15

Apollo 12 and Surveyor 3
Image Credit: NASA, Apollo 12, Alan Bean - Stereo Image Copyright: Kevin Frank

Explanation: Put on your red/blue glasses and gaze across the western Ocean of Storms on the surface of the Moon. The 3D anaglyph features Apollo 12 astronaut Pete Conrad visiting the Surveyor 3 spacecraft in November of 1969. Surveyor 3 had landed at the site on the inside slope of a small crater about 2 1/2 years earlier in April of 1967. Visible on the horizon beyond the far crater wall, Apollo 12's Lunar Module Intrepid touched down less than 200 meters (650 feet) away, easy moonwalking distance from the robotic Surveyor spacecraft. This stereo image was carefully created from two separate pictures (AS12-48-7133, AS12-48-7134) captured on the lunar surface. They depict the scene from only slightly different viewpoints, approximating the separation between human eyes.

BIOMES - Prairies - savanes - brousses

Des prairies, des savanes et des brousses, il y en a aussi dans les régions tempérées.

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ASTRONOMY - IC 348 and Barnard 3

 2024 November 14

IC 348 and Barnard 3
Image Credit & Copyright: Ashraf Abu Sara

Explanation: A great nebulous region near bright star omicron Persei offers this study in cosmic contrasts. Captured in the telescopic frame the colorful complex of dust, gas, and stars spans about 3 degrees on the sky along the edge of the Perseus molecular cloud some 1000 light-years away. Surrounded by a bluish halo of dust reflected starlight, omicron Persei itself is just left of center. Immediately below it lies the intriguing young star cluster IC 348 recently explored by the James Webb Space Telescope. In silhouette against the diffuse reddish glow of hydrogen gas, dark and obscuring interstellar dust cloud Barnard 3 is at upper right. Of course the cosmic dust also tends to hide newly formed stars and young stellar objects or protostars from prying optical telescopes. At the Perseus molecular cloud's estimated distance, this field of view would span about 50 light-years.

BIOMES - Madagascar

Dans les forêts des basses terres de Madagascar, une précieuse biodiversité

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ASTRONOMY - Barred Spiral Galaxy NGC 1365 from Webb

 2024 November 13

Barred Spiral Galaxy NGC 1365 from Webb
Image Credit: NASA, ESA, CSA, Janice Lee (NOIRLab) - Processing: Alyssa Pagan (STScI)

Explanation: A mere 56 million light-years distant toward the southern constellation Fornax, NGC 1365 is an enormous barred spiral galaxy about 200,000 light-years in diameter. That's twice the size of our own barred spiral Milky Way. This sharp image from the James Webb Space Telescope's Mid-Infrared Instrument (MIRI) reveals stunning details of this magnificent spiral in infrared light. Webb's field of view stretches about 60,000 light-years across NGC 1365, exploring the galaxy's core and bright newborn star clusters. The intricate network of dusty filaments and bubbles is created by young stars along spiral arms winding from the galaxy's central bar. Astronomers suspect the gravity field of NGC 1365's bar plays a crucial role in the galaxy's evolution, funneling gas and dust into a star-forming maelstrom and ultimately feeding material into the active galaxy's central, supermassive black hole.

MUSIQUE - Antonín dvořák - Sérénade pour cordes en mi majeur (1876)

 

"Sérénade pour cordes en mi majeur"

BIOMES - Canada

Au Canada, il y a aussi des forêts tempérées

FuturaSciences

ASTRONOMY - NGC 6888: The Crescent Nebula

 2024 November 12

NGC 6888: The Crescent Nebula
Image Credit & Copyright: Team ARO

Explanation: How was the Crescent Nebula created? Looking like an emerging space cocoon, the Crescent Nebula, visible in the center of the featured image, was created by the brightest star in its center. A leading progenitor hypothesis has the Crescent Nebula beginning to form about 250,000 years ago. At that time, the massive central star had evolved to become a Wolf-Rayet star (WR 136), shedding its outer envelope in a strong stellar wind, ejecting the equivalent of our Sun's mass every 10,000 years. This wind impacted surrounding gas left over from a previous phase, compacting it into a series of complex shells, and lighting it up. The Crescent Nebula, also known as NGC 6888, lies about 4,700 light-years away in the constellation of Cygnus. Star WR 136 will probably undergo a supernova explosion sometime in the next million years.

BIOMES - Le Pantanal

Le Pantanal, la plus grande prairie humide de la Planète

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