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21/04/2026
Santé/Médecine - LES SYMPTOMES DE LA FIBROMYALGIE: 1. DES DOULEURS MUSCULAIRES - (3/12)
Astronomy - THREE SKY ARCHES OVER SNOWY ALPS
2026 April 21
Image Credit & Copyright: Angel Fux
Explanation: Why are there three arches across the sky instead of two? Last month, after being dropped off by a helicopter at a high mountain peak in the Alps near the Swiss Italian border, an adventurous astrophotographer expected two arches of our Milky Way galaxy to be visible during the night. These were the inner arch looking in toward the center of our galaxy on the left, visible just before sunrise, and the outer arch on the right visible just after sunset. But there were three arches. The surprised astrophotographer soon realized that the sky was so dark that an entire arc of faint zodiacal light was also noticeable -- sunlight scattered by inner Solar System dust. And it artfully connected the two Milky Way arches! The next morning a helicopter picked the astrophotographer back up, and after 40 hours of processing and combining that night's images, the featured triple-arch 360-degree panorama resulted.
20/04/2026
Santé/Medecine - LA FIBROMYALGIE (2/12)
Voici les symptômes de la fibromyalgie chez l'homme et la femme :
Certaines choses du quotidien peuvent aggraver les symptômes de cette maladie. Voici les 4 principales à connaître :
- les niveaux de stress,
- le froid,
- l’humidité et
- l’effort physique.
Et inversement, ceux qui les calment, mais seulement de manière temporaire, sont :
- la chaleur (par exemple, une douche ou un bain chauds) et
- le sommeil.
Voyons maintenant ensemble quels sont les symptômes que vous devez identifier pour savoir si vous souffrez de fibromyalgie...
Astronomy - COMET R3 PauSTARRS OVER A HIMALAYAN VALLEY
2026 April 20
Image Credit & Copyright: Basudeb Chakrabarti & Samit Saha
Explanation: The best way to see comet R3 PanSTARRS’s long tail is with a camera. This week, the recently brightened comet appears in northern skies to the east just before dawn, but is only barely visible to the unaided eye. The many-degree ion tail captured on long duration camera exposures is not unusual for a comet - it is primarily due to the Earth's nearly sideways view of the tail as it points away from the Sun. In the featured image taken last week, Comet C/2025 R3 (PanSTARRS) showed off its flowing tail through a valley between two peaks in the Himalayan mountains of India. The comet passed its closest to the Sun yesterday. As it nears its closest approach to Earth next week, a bushy dust tail may become visible. The comet is slowly moving out of northern skies and by the end of the month will be visible after sunset in southern skies as it fades and leaves our Solar System.
19/04/2026
Santé/Médecine - LA FIBROMYALGIE FATIGUE BEAUCOUP ET PROVOQUE DES DOULEURS ARTICULAIRES - (1/12)
Astronomy - EYE ON THE MILKY WAY
2026 April 19
Image Credit & Copyright: Miguel Claro (TWAN, Dark Sky Alqueva)
Explanation: Have you ever had stars in your eyes? It appears that the eye on the left does, and moreover, it appears to be gazing at even more stars. The featured 27-frame mosaic was taken in 2019 from Ojas de Salar in the Atacama Desert of Chile. The eye is actually a small lagoon captured reflecting the dark night sky as the Milky Way Galaxy arched overhead. The seemingly smooth band of the Milky Way is really composed of billions of stars, but decorated with filaments of light-absorbing dust and red-glowing nebulas. Additionally, both Jupiter (slightly left the galactic arch) and Saturn (slightly to the right) are visible. The lights of small towns dot the unusual vertical horizon. The rocky terrain around the lagoon appears to some more like the surface of Mars than our Earth.
17/04/2026
Astronomie - ETOILES FILANTES - LE RADIANT DES PERSEIDES
Astronomy - M82: STARBURST GALAXY WITH A SUPERWIND
2026 April 17
Image Credit & Copyright: Arnaud Malleval
Explanation: Messier 82 is a starburst galaxy with a superwind. In fact, through supernova explosions and powerful winds from massive stars, the burst of star formation in M82 is driving a prodigious outflow. Evidence for the superwind from the galaxy's central regions is clear in the sharp telescopic portrait. The composite image includes 33 hours of narrowband data, highlighting emission from long outflow filaments of atomic hydrogen gas in reddish hues. Some of the gas in the superwind, enriched in heavy elements forged in the massive stars, will eventually escape into intergalactic space. Triggered by a close encounter with nearby large galaxy M81, the furious burst of star formation in M82 should last about 100 million years or so. Also known as the Cigar Galaxy for its elongated visual appearance, M82 is about 30,000 light-years across. It lies 12 million light-years away near the northern boundary of Ursa Major.
16/04/2026
Astronomy - LAUNCH PLUME : SPACE X JELLYFISH
2026 March 19
Image Credit & Copyright: Michael Seeley
Text: Cecilia Chirenti (NASA GSFC, UMCP, CRESST II)
Explanation: Even if you live with your head in the clouds, you won’t find a jellyfish like this one very often. The featured image shows a SpaceX Falcon 9 rocket launch from Cape Canaveral in Florida on March 4. The launch happened 52 minutes before sunrise, and the second stage rocket exhaust plume was high enough in the sky to catch the light of the rising sun, while the photographer was still in the dark. This combination of light and shadow, possible at dawn or dusk, makes the exhaust, mostly water vapor and carbon dioxide, appear as a glowing cloud. It only looks like it's going down, as the rocket follows the curvature of the Earth on its way to space. A related effect is the twilight phenomenon, which causes colorful contrails sometimes mistaken for UFOs. But, in case you are wondering: real jellyfish were sent to space by NASA in the 1990s as part of a science experiment.
15/04/2026
Astronomie -ETOILES FILANTES - DANS LE CIEL JAPONAIS
Astronomy - THE ISS TRANSITS THE MOON
2026 April 15
Image Credit & Copyright: Sébastien Borie
Text: Keighley Rockcliffe (NASA GSFC, UMBC CSST, CRESST II)
Explanation: Nope, that is not an alien spaceship landing on the Moon! This is an image of the International Space Station (ISS) as it begins to transit in front of the Moon. The ISS is in low-Earth orbit (LEO) where it wizzes around the Earth every 90 minutes. Orbiting the Earth 16 times per day for 25 years, the ISS has photobombed many familiar celestial objects including Venus, Mars, Saturn, and the Sun. Thousands of experiments led by researchers from over one hundred countries have been conducted on the ISS. Growing protein crystals in low gravity was one of the first experiments onboard the ISS and continues to contribute to new medical treatments. ISS astronauts study plant growth, water recycling, human health, and more to support the Artemis missions which will take humans farther than they’ve ever gone before. Next time you are out and about at night, try to spot the ISS zooming across the sky!
14/04/2026
Astronomie - ETOILES FILANTES - AVERSE DE PERSEIDES EN UKRAINE
Astronomy - NGC 602 AND BEYOND
2026 April 13
Image Credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA) - ESA/Hubble Collaboration
Explanation: The clouds may look like an oyster, and the stars like pearls, but look beyond. Near the outskirts of the Small Magellanic Cloud, a satellite galaxy some 200 thousand light-years distant, lies 5 million year young star cluster NGC 602. Surrounded by natal gas and dust, NGC 602 is featured in this stunning Hubble image of the region. Fantastic ridges and swept back shapes strongly suggest that energetic radiation and shock waves from NGC 602's massive young stars have eroded the dusty material and triggered a progression of star formation moving away from the cluster's center. At the estimated distance of the Small Magellanic Cloud, the featured picture spans about 200 light-years, but a tantalizing assortment of background galaxies are also visible in this sharp multi-colored view. The background galaxies are hundreds of millions of light-years or more beyond NGC 602.
11/04/2026
News en Images - ARTEMIS II ET LA FACE CACHéE DE LA LUNE
10/04/2026
Astronomy - ESPLORING THE ANTENNAE
2026 April 10
Image Credit & Copyright: Acquisition - Mike Selby Processing - Roberto Colombari
Explanation: Some 60 million light-years away in the southerly constellation Corvus, two large galaxies are colliding. Stars in the two galaxies, cataloged as NGC 4038 and NGC 4039, very rarely collide in the course of the ponderous cataclysm that lasts for hundreds of millions of years. But the galaxies' large clouds of molecular gas and dust often do, triggering furious episodes of star formation near the center of the cosmic wreckage. Spanning over 50 thousand light-years, this stunning telescopic frame also reveals new star clusters and matter flung far from the scene of the accident by gravitational tidal forces. The remarkably sharp ground-based image follows the faint tidal tails and distant background galaxies in the field of view. The suggestive overall visual appearance of the extended arcing structures gives the galaxy pair, also known as Arp 244, its popular name - The Antennae.
09/04/2026
Santé/Médecine - CANCER - AVANCEES MAJEURES ET ESPOIR - CES CELLULES QUI CONTRIBUENT AU DEVELOPPEMENT DE CANCERS
08/04/2026
Astronomy - EARTHSET
2026 April 8
Image Credit: NASA
Text: Keighley Rockcliffe (NASA GSFC, UMBC CSST, CRESST II)
Explanation: And to all of you down there on Earth and around Earth, we love you, from the Moon. We will see you on the other side,
said Artemis II pilot Victor Glover on April 6th at 6:44pm ET as 8.3 billion minus four people and one Earth set below the Moon's horizon. The Orion spacecraft, Integrity, then traveled behind the Moon as part of its seven-hour lunar flyby. The crew characterized never-before-seen regions of the far side of the Moon, which is puzzlingly less volcanically active than the near side. New observations of crater peaks, floors, terraces, and rings preserved on the lunar surface will help piece together the impact history of the Solar System. Among many other surface characterizations, the crew observed one of the Moon's best-preserved basins, the Orientale basin, and identified two new craters. As Earth rose above the Moon’s horizon and Integrity began its return home, Artemis II mission specialist Christina Koch powerfully summarized humanity’s grander mission: ...we will always choose Earth. We will always choose each other.
07/04/2026
Santé/Médecine - CANCER : AVANCEES MAJEURES ET ESPOIR -
Astronomy - IC 4592:THE BLUE HORSEHEAD REFLECTION NEBULA
2026 April 7
Image Credit & Copyright: Rabeea Alkuwari
Explanation: Do you see the horse's head? What you are seeing is not the famous Horsehead nebula toward Orion, but rather a fainter nebula that only takes on a familiar form with deeper imaging. The main part of the here-imaged molecular cloud complex is reflection nebula IC 4592. Reflection nebulas are made up of very fine dust that normally appears dark but can look quite blue when reflecting the visible light of energetic nearby stars. In this case, the source of much of the reflected light is a star at the eye of the horse. That star is part of Nu Scorpii, one of the brighter star systems toward the constellation of the Scorpion (Scorpius). A second reflection nebula dubbed IC 4601 is visible surrounding two stars just below the image center. The featured picture was taken from Sawda Natheel in Qatar.
04/04/2026
Astronomy - HELLO WORLD
2026 April 4
Image Credit: NASA, Reid Wiseman, Artemis II
Explanation: From pole to pole our fair planet is captured in this snapshot from space, an evocative image from a window of the Orion spacecraft Integrity. From the spacecraft's perspective the Sun is moving behind Earth's bright limb along the lower right. Africa and the Iberian peninsula are in view on the pale blue planet's surface, while aurorae crown Earth's south and north poles at top right and bottom left. Commander Reid Wiseman took the historic picture on Artemis II mission flight day 2 (April 2), after the completion of the planned translunar injection burn. That burn boosted the spacecraft out of Earth orbit, sending Integrity and crew on a trajectory that will take them around the Moon and back again. That's a journey humans last made over 50 years ago.
03/04/2026
Astronomy - CAUGHT IN THE WEB: VISUALIZATION OF A BLACK HOLE MERGER IN THE TARANTULA NEBULA
2026 April 3
Illustration Credit & Copyright: Artwork: Carl Knox (OzGrav, Swinburne University of Technology);
Astrophotography: Blake Estes & Christian Sasse, iTelescope.net; Text: Cecilia Chirenti (NASA GSFC, UMCP, CRESST II)
Explanation: How can we see what is invisible? Black holes are not easy to see in the dark cosmic night, but astronomers can find them by analyzing their gravitational effects on matter, light and spacetime. The featured image shows an illustration that combines a simulation of a black hole binary system in its final "death-dance" with an astrophotography image of the Tarantula Nebula in the background. Even though black holes don't emit light, they distort the path of light rays, acting like a gravitational lens. As a result, the nebula appears extremely distorted, forming Einstein rings and multiple images. Tarantula Nebula lies in the Large Magellanic Cloud, a dwarf galaxy that is one of the satellite galaxies of the Milky Way, 160,000 light-years away. That is more than 1,000 times closer than any of the binary black hole mergers detected so far. We'll probably never detect a merger so close to home!
Santé/Médecine - CANCER : AVANCEES MAJEURES ET ESPOIR - LA DANGEROSITé DES METASTASES
02/04/2026
Astronomy - LIFTOFF! RETURNING TO THE MOON
2026 April 2
Image Credit & Copyright: NASA/Bill Ingalls; Text: Ogetay Kayali (MTU)
Explanation: We are one small step closer to returning to the Moon. A new chapter in human exploration began yesterday when NASA's Artemis II launched aboard the Space Launch System (SLS) from Kennedy Space Center. Carrying four astronauts, the Orion spacecraft's planned lunar flyby will be the first in over half a century. This historic test flight, echoing the legacy of Apollo while pushing beyond it, will carry its crew farther from Earth than any humans since 1972, looping around the Moon before returning home. During the approximately ten-day journey, Orion's systems--from life support to navigation--will be tested in deep space, while astronauts observe the lunar surface, including shadowed regions of the far side rarely seen with such perspective. After looping around the Moon, the astronauts will return to Earth, ending their journey with a Pacific Ocean splashdown.
News en images - HISTORIQUE
01/04/2026
Astronomy - THE CLAW AND BUBBLE NEBULAE
Image Credit & Copyright: Richard Whitehead
Text: Keighley Rockcliffe (NASA GSFC, UMBC CSST, CRESST II)
Explanation: What unexpected things do you see when you look up at the night sky? Today’s image resembles an abstract painting, with large swaths of color strewn across a cosmic canvas seemingly without design. Despite the image's abstract nature, the human mind finds patterns, identifying a large claw reaching up towards a floating bubble. Embedded within these seemingly random structures are the physical laws that govern how light and matter interact. The Claw (Sh2-157) and Bubble (NGC 7635) Nebulae glow colors that are mapped to the yellow and blue shown, indicating the presence of hydrogen and oxygen ionized by the intense light emitted from stars several times the mass of the Sun. This image depicts both the chaos and structure of astronomical processes, showing that a common thread between art and science is to look for the unexpected.
Santé/Médecine - LES SYMPTOMES DE LA FIBROMYALGIE: 1. DES DOULEURS MUSCULAIRES - (3/12)
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