Astronomy - R3PanSTARRS : AN ORION COMET

 2026 May 15

R3 PanSTARRS: An Orion Comet
Image Credit & Copyright: Chester Hall-Fernandez

Explanation: Comet R3 PanSTARRS might be best remembered as an Orion comet. A key reason is because Comet C/2025 R3 (PanSTARRS) was near its most spectacular -- in terms of tail visibility -- when passing in front of the iconic constellation. Although rare, other bright comets, too, have ventured across Orion, including Lovejoy in 2015, Hale-Bopp in 1997, and the Great Comet of 1264. Best visible in long duration exposures, the featured image was captured last week from the Craigieburn Mountain Range in New Zealand. Visible in the deep background image are the Orion Nebula, Barnard's Loop, and through R3's tail, the bright star Saiph, the sixth brightest star in the constellation of Orion. Comet R3 PanSTARRS continues to fade as it moves further south, passing into the constellation of the Unicorn (Monoceros) in the next few days.

Astronomy - MESSIER CATALOG AT UNIFORM SCALE

 2026 May 14

Messier Catalog at Uniform Scale
Image Credit: Sylvain Villet
Text: Cecilia Chirenti (NASA GSFC, UMCP, CRESST II)

Explanation: What are some of the most interesting astronomical objects you can see in the night sky? Armed with a good pair of binoculars or a small telescope, if you live in the Northern Hemisphere, you can look for the very popular objects in the Messier Catalog. Most of them, but not all, are also visible from the southern half of the Earth. The featured image shows all 110 objects in the catalog at uniform scale -- the same magnification. Charles Messier created the catalog in the 18th century. He was interested in comets, and his catalog was a list of known comet-like "objects to avoid" in the sky when observing or hunting for comets. The deep sky objects in the catalog include a supernova remnant (the Crab Nebula, M1), other galaxies (such as Andromeda, M31), nebulae (e.g. the Orion Nebula, M42, a star-forming region) and stellar clusters (such as the Pleiades, M45, a bright young open cluster).

Astronomy - NGC188: OLD CLUSTER IN THE NEW GENERAL CATALOG

 2026 May 13

NGC 188: Old Cluster in the New General Catalog
Image Credit & Copyright: Neven Krcmarek

Explanation: The New General Catalog of star clusters and nebulae really isn't so new. In fact, it was published in 1888 - an effort by J. L. E. Dreyer to consolidate the work of astronomers William, Caroline, and John Herschel along with others into a useful single, complete catalog of astronomical discoveries and measurements. Dreyer's work was largely successful and is still important today, as this famous catalog continues to lend its "NGC" to bright clusters, galaxies, and nebulae. Take for example the star cluster known as NGC 188 (item number 188 in the NGC compilation). It lies about 6,000 light-years distant in the northern constellation Cepheus and represents a galactic or open star cluster. With an age of about 7 billion years, NGC 188 is old for an open cluster. Its old, evolved red giant stars have yellowish hues in this colorful, deep sky view. NGC 188 also enjoys the designation Caldwell 1 in a modern compilation of deep sky objects. Located well above the plane of the Milky Way and seen in the direction of planet Earth's north celestial pole, the ancient stellar group is known to some as the Polarissima Cluster.

Astronomie - SPLENDIDES RAPPROCHEMENTS LUNE-VENUS-JUPITER

Du 18 au 20 mai, un beau croissant de lune s'approche de Vénus puis de Jupiter dans le ciel du soir. Un très beau spectacle à admirer à l'œil nu, tout simplement.

Stelvision

Astronomy - THE CUNJUNCTION OF COMET R3 PauSTARRS AND THE ORION NEBULA

 2026 May 12

The Conjunction of Comet R3 PanSTARRS and the Orion Nebula
Image Credit & Copyright: Julien De Winter, Sascha Ebeler
Text: Keighley Rockcliffe (NASA GSFC, UMBC CSST, CRESST II)

Explanation: Today’s composite image features something old, something new, something borrowed, and something blue! Comet R3 PanSTARRS, streaking across the right of the image, likely originated from the Oort Cloud, meaning it is an old Solar System relic from billions of years ago. It’s bright extended ion tail glows blue as the gas escaping the comet’s core is ionized by sunlight. Astronomers are fascinated by comets for all sorts of reasons: comet compositions are untouched time capsules containing the building blocks of Solar System planets; comets may have delivered water to the young Earth; the behavior of cometary tails shed light on solar wind and radiation interactions. The background mosaic, featuring the Orion Nebula (M42), was taken over two nights of observation with the comet captured on the third night. The Orion Nebula is our nearest stellar nursery and, at about 2 million years old, is our something (relatively) new! Now at around 127.5 million kilometers from Earth, we wave goodbye to the borrowed Comet R3 PanSTARRS as it leaves the Solar System.

Vulcanologie - NGAURUHOE (NOUVELLE ZELANDE)

Avec 2,291 mètres d'altitude, sa dernière éruption a eu lieu en 1977. Ce paysage est de toute beauté.

©Getty Images

Astronomy - MOON SETTING BEHIND TEIDE VOLCANO

 2026 May 11

Moon Setting Behind Teide Volcano
Video Credit & Copyright: Daniel López (El Cielo de Canarias); Music: Piano della Moon (Dan Silva)

Explanation: These people are not in danger. What is coming down from the left is just the Moon, far in the distance. Luna appears so large here because she is being photographed through a telescopic lens. What is moving is mostly the Earth, whose spin causes the Moon to slowly disappear behind Mount Teide, a volcano in the Canary Islands of Spain off the northwest coast of Africa. The people pictured are 16 kilometers away and many are facing the camera because they are watching the Sun rise behind the photographer. It is not a coincidence that a full moon sets just when the Sun rises because the Sun is always on the opposite side of the sky from a full moon. The featured video was made in 2018 during a full Milk Moon. The video is not time-lapse -- this was really how fast the Moon was setting.

Astronomy - COMET R3 PanSTARRS AND ORION

 2026 May 10

Comet R3 PanSTARRS and Orion
Image Credit & Copyright: Luc Perrot (TWAN)

Explanation: Orion never had a sword like this. As Comet C/2025 R3 (PanSTARRS) heads out of the inner Solar System, it is putting on quite a show for long exposure cameras. Currently seen toward the constellation of Orion the Hunter, the distant Orion Nebula is visible on the upper right. Comet R3 PanSTARRS is now showing two distinct tails: a short dust tail pointing toward the top of the image and a long and wavy ion tail trailing off toward the upper left. The ion tail points away from the Sun and glows blue from excited carbon monoxide. Large particles in the dust tail somewhat resist the radiation pressure that push them away from the Sun and so retain a bit of the comet's orbit. The dust tail shines by reflected sunlight. The featured image was taken a few days ago from France's Reunion Island in the southern Indian Ocean.

Astronomy - MESSIER CRATERS IN STEREO

 2026 May 9

Messier Craters in Stereo
Image Credit: Apollo 11, NASA; Stereo Image Copyright Patrick Vantuyne

Explanation: Many bright nebulae and star clusters in planet Earth's sky are associated with the name of astronomer Charles Messier from his famous 18th century catalog. His name is also given to these two large and remarkable craters on the Moon. Standouts in the dark, smooth lunar Sea of Fertility or Mare Fecunditatis, Messier (left) and Messier A have dimensions of 15 by 8 and 16 by 11 kilometers respectively. Their elongated shapes are explained by the extremely shallow-angle trajectory followed by an impactor, moving left to right, that gouged out the craters. The shallow impact also resulted in two bright rays of material extending along the surface to the right, beyond the picture. Intended to be viewed with red/blue glasses (red for the left eye), this striking stereo picture of the crater pair was recently created from high resolution scans of two images (AS11-42-6304, AS11-42-6305) taken during the Apollo 11 mission to the Moon.

Santé/Médecine - LES SYMPTOMES DE LA FIBROMYALGIE: 10. AUTRES SYMPTOMES - (12/12)

Quels sont les autres symptômes de la fibromyalgie ?

À ces principaux symptômes s’ajoutent aussi des symptômes moins caractéristiques, mais tout aussi pénibles :

 

- vertiges et maladresse 

- sensation de chaud ou froid, qui est due au fait que l’organisme n’arrive pas à correctement régler la température corporelle

- impatiences, ou syndrome des jambes sans repos (SJSR), une envie irrésistible de bouger les jambes lorsqu’elles sont au repos 

- sensations de picotements et d’engourdissement au niveau des pieds et des mains (aussi appelée paresthésie) 

- un besoin fréquent d’uriner, souvent associé à des douleurs lorsque l’on fait pipi 

- chez les femmes, des règles beaucoup plus douloureuses qu’à la normale 

- anxiété, souvent liée à la crainte de souffrir d’une maladie grave.

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