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30/04/2026
Astronomy - A DOUBLE HELIX LUNAR ECLIPSE
2025 November 3
Image Credit & Copyright: Chunlin Liu
Explanation: The image was timed to capture a total lunar eclipse -- but it came with quite a twist. First, the eclipse: the fully Earth-shadowed Moon is visible as the orange orb near the top. The eclipsed Moon's orange color is caused by a slight amount of red light scattered first by Earth's atmosphere, adding a color like a setting Sun. Now, the twist: one of the apparent double helix bands is the Milky Way, the central disk of our home galaxy. The second band is zodiacal light, sunlight scattered by dust in our Solar System. The reason they cross is because the plane where dust orbits our Sun is tilted relative to the plane where stars orbit our Galaxy. This well-known tilt is shown dramatically in the featured wide-angle Mercator-projected picture, spanning from horizon to horizon, captured in early September from Mingantu Observing Station in Inner Mongolia, China.
29/04/2026
Santé/Médecine - LES SYMPTOMES DE LA FIBROMYALGIE: 5. PERTURBATION DU SOMMEIL (7/12)
Astronomy- THE MOON VENUS AND THE PLEIADES
2026 April 29
Image Credit & Copyright: Gianni Tumino
Text: Keighley Rockcliffe (NASA GSFC, UMBC CSST, CRESST II)
Explanation: No, Earth did not recently acquire six more moons! Today’s APOD is a combination of images following the Moon, Venus, and the Pleiades across a southern Sicilian sky as twilight turned to evening on April 19. From 2023 to 2029, the Pleiades' and the Moon “visit" each other once per month due to the Pleiades' location in the ecliptic plane. April 2026 saw the celestial alignment of their visit with Venus. About six stars in the Pleiades cluster (Messier 45) are typically visible with the unaided eye. Due to the cluster’s visibility across the world, there are many myths and legends across cultures associated with the Pleiades. The Haudenosaunee people of North America, for example, say that seven boys danced so enthusiastically that they lifted off into the sky. Astronomers recently found thousands more Pleiades members, showing that after thousands of years of gazing upon this cluster, there is yet more to learn about the Pleiades.
28/04/2026
Astronomy - CG 30: COMETARY GLOBULES
Image Credit & Copyright: Marcelo Salemme
Explanation: They're like mountain peaks, but they are forming stars. Bright-rimmed, flowing shapes gather near the center of this rich starfield toward the borders of the nautical southern constellations Puppis and Vela. Composed of interstellar gas and dust, the grouping of light-year sized cometary globules is about 1300 light-years distant. Energetic ultraviolet light from nearby hot stars has molded the globules and ionized their bright rims. The globules also stream away from the Vela supernova remnant which may have influenced their swept-back shapes. Within them, cores of cold gas and dust are likely collapsing to form low mass stars whose formation will ultimately cause the globules to disperse. In fact, cometary globule CG 30 (upper right in the group) sports a small reddish glow inside its head, a telltale sign of energetic jets from a star in the early stages of formation.
Santé/Médecine - LES SYMPTOMES DE LA FIBROMYALGIE: 4. UNE FATIGUE PERSISTANTE (6/12)
27/04/2026
Astronomy - CG 4: THE GLOBULE AND THE GALAXY
2026 March 11
Image Credit & Copyright: William Vrbasso
Text: Cecilia Chirenti (NASA GSFC, UMCP, CRESST II)
Explanation: Is this a cosmic monster ready to devour an unsuspecting galaxy? Thankfully, that is not the case. The red “monster” shown in the featured image is Cometary Globule CG 4, 1,300 light-years away in the Constellation Puppis. CG 4 is a molecular cloud, where hydrogen becomes cold enough to form molecules that can be brought together by gravity to create stars. The shape of CG 4 resembles that of a comet, but its head is 1.5 light-year in diameter and its tail is 8 light-years long; for comparison, the distance from the Earth to the sun is only 8 light-minutes. Astronomers believe that the tail of a cometary globule could have been shaped by a nearby supernova explosion or by irradiation from hot, massive stars. Indeed, CG 4 and other nearby globules point away from the Vela Supernova Remnant, at the center of the Gum Nebula. The edge-on spiral galaxy, ESO 257-19, is more than a hundred million light-years beyond CG 4, and is completely safe from the “monster”.
26/04/2026
Astronomy - MYSTIC MOUNTAIN MONSTER BEING DESTROYED
2026 April 26
Image Credit: Hubble, NASA, ESA; Processing & License: Judy Schmidt
Explanation: Inside the head of this interstellar monster is a star that is slowly destroying it. The huge monster, actually an inanimate series of pillars of gas and dust, measures light years in length. The in-head star is not itself visible through the opaque interstellar dust but is bursting out partly by ejecting opposing beams of energetic particles called Herbig-Haro jets. Located about 7,500 light years away in the Carina Nebula and known informally as Mystic Mountain, the appearance of these pillars is dominated by dark dust even though they are composed mostly of clear hydrogen gas. The featured image was taken with the Hubble Space Telescope. All over these pillars, the energetic light and winds from massive newly formed stars are evaporating and dispersing the dusty stellar nurseries in which they formed. Within a few million years, the head of this giant, as well as most of its body, will have been completely evaporated by internal and surrounding stars.
25/04/2026
Santé/Médecine - LES SYMPTOMES DE LA FIBROMYALGIE: 3. - DES RAIDEURS MATINALES (5/12)
Astronomy - THE PERSISTENCE OF SUNLIGHT
2026 April 25
Image Credit & Copyright: Lorenzo Busilacchi
Explanation: This seaside sunset offered a surreal experience, captured in a sea and skyscape from the west coast of Sardinia, Italy, planet Earth. The Daliesque scene is a composition of sequential exposures made with a camera and long telephoto lens. The Sun is not melting, though. Its shifting and fluid appearance as it nears the horizon is caused as refraction along the line of sight changes and creates distorted images or mirages of the reddened solar disk. The changes in atmospheric refraction correspond to atmospheric layers with sharply different temperatures and densities. Another famous but fleeting effect of atmospheric refraction produced by a long sight-line to the setting (or rising) Sun is often called the green flash.
24/04/2026
Astronomy - YOUNG MOON AND SISTER STARS
Image Credit & Copyright: Giorgia Hofer
Explanation: Sunlit arms of a crescent moon seem to embrace the faint lunar night side in this dramatic celestial scene from planet Earth. The single telephoto exposure tracking the sky was captured on the night of April 19, when a two day old Moon was near perigee in its elliptical orbit. On that date, the young Moon was also close on the sky to the lovely Pleiades Star Cluster. With the moonlight dimmed by clouds the Pleiades sister stars gather below the Moon's bright crescent, seen through a faint but colorful lunar corona. The lunar night side is illuminated by earthshine, sunlight reflected from the Earth itself. The Moon's ashen glow, also known as the "old moon in the young moon's arms", tends to be brighter in the northern hemisphere spring. And for now, the Moon's orbit takes it near the Pleiades stars each month in planet Earth's sky, though their close conjunctions are easiest to see when the Moon is near a crescent phase.
23/04/2026
Santé/Médecine - LES SYMPTOMES DE LA FIBROMYALGIE: 2. UNE GRANDE SENSIBILITE A LA DOULEUR - (4/12)
Astronomy - LARGE SCALE STRUCTURE OF THE UNIVERSE
2026 April 23
Image Credit: Claire Lamman/DESI collaboration
Text: Cecilia Chirenti (NASA GSFC, UMCP, CRESST II)
Explanation: This is a map of the universe. The Dark Energy Spectroscopic Instrument (DESI) at Kitt Peak National Observatory, Arizona, has finished its five-year survey. It observed more than 47 million galaxies and quasars and created a 3D map centered on the Earth. Today's featured image shows a thin slice of these data: the black gaps indicate where our Galaxy obscures distant objects. The feathery web in the inset shows the large scale structure of the universe. Light of the most distant galaxies shown here travelled for 11 billion years to reach the Earth. Galaxies cluster throughout cosmic history under the competing influences of gravity and dark energy, responsible for the accelerated expansion of the universe. Analysis of early DESI results hinted at the possibility that dark energy, described as a cosmological constant by Albert Einstein, may not be constant after all. But we still have to wait for the analysis of the now complete dataset. The nature of dark energy is the biggest mystery of cosmology.
22/04/2026
Astronomy - EARTHSET WITH AN IPHONE
2026 April 22
Video Credit: NASA, Reid Wiseman
Text: Keighley Rockcliffe (NASA GSFC, UMBC CSST, CRESST II)
Explanation: What does it mean for the Earth to set? Artemis II Commander Reid Wiseman gave us another spectacular view of Earth from their historic flyby of the Moon. Commander Wiseman's video, taken with an iPhone at 8x zoom, shows our entire planet gradually blocked from view by the Moon. On the Earth, the 24-hour planetary rotation causes the Sun to set below your horizon every night. However, on Artemis II the Earthset was caused not by the Moon’s rotation but by the spacecraft moving behind the Moon (at about 55 seconds in this video). Once rare, views of Earth are now taken many times a day from many spacecraft, including NASA’s SWOT (Surface Water and Ocean Topography) satellite tracking freshwater resources and USGS Landsat 8 and 9 satellites supporting water management for farmers, for example. Space agencies around our home planet now work together to provide unique and ever-improving views of our Earth.
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
Astronomy - AURORA SLATHERS UP THE SKY
2026 May 16 Aurora Slathers Up the Sky Image Credit: Jack Fischer , Expedition 52 , NASA Explanation: Like salsa verde on your favorite...
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Imaginez un monde où le cancer n’est plus une sentence, mais une simple étape à franchir. Grâce à une découverte révolutionnaire, ce rêve es...
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2026 January 1 Auroral Corona Image Credit & Copyright : Roi Levi Explanation: Cycle 25 solar maximum made 2025 a great year for ...



















