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.

CommentEconomiser

Astronomy - COMET R3 PanSTARRS BEFORE RIGEL

 2026 May 8

Comet R3 PanSTARRS Before Rigel
Image Credit & Copyright: Jakub Kuřák & Martin Mašek (FZU of the Czech Academy of Sciences)

Explanation: Which way is Comet R3 PanSTARRS going? Not towards the star at the top of the image, because that is Rigel, which, being far in the background, is unrelated to the comet. Not through the nebula in the image middle, because that is the Witch Head Nebula and it, too, is far in the distance -- but not far from Rigel.  Not into northern skies because over the past week Comet C/2025 R3 (PanSTARRS) has moved into southern skies and is now best visible in Earth's Southern Hemisphere toward the west after sunset.  Angularly, Comet R3 PanSTARRS is slowly moving toward the upper right, night by night, and will soon be in the constellation Orion. Spatially, the comet is now headed out of our Solar System but should remain visible to cameras in southern skies for about a week. The featured image was captured last week near Cerro Paranal in Chile.

Santé/Médecine - LES SYMPTOMES DE LA FIBROMYALGIE: 9. Un état dépressif - (11/12)

Parce que la fibromyalgie est une maladie invalidante, la dépression apparaît parfois chez ceux qui en souffrent. Lorsque c’est le cas, la dépression entraîne à son tour d’autres symptômes, y compris :

 

- un état dépressif constant, 

- un sentiment de découragement et d’impuissance, 

- une perte d’intérêt pour le monde extérieur. 

Si vous pensez souffrir de dépression, parlez-en à votre médecin. Ou encore, si vous en avez déjà consulté, à un professionnel de santé spécialisé dans la fibromyalgie.

CommentEconomiser

Astronomie - ÉTOILE FILANTE DANS LE CIEL JAPONAIS

Magnifique étoile filante associée à l'essaim météoritique des Perséides photographiée dans le ciel de Narusawa-mura, au sud-ouest de Tokyo, le 13 août 2016. Comme on peut le voir, le bolide semble avoir été décoché par Persée (à gauche de la photo). La grappe d'étoiles en dessous de l'horizon est celle des Pléiades (Subaru, en japonais).

© reonides, Flickr