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08/05/2026

Astronomy - COMET R3 PanSTARRS BEFORE RIGEL

 2026 May 8

A starfield appears with three large objects. Near the top is a 
bright star. Near the middle is a small light blue nebula. And 
near the bottom is a comet with its long tail extending to the 
upper left and passing in front of both the star and the blue 
nebula. 
Please see the explanation for more detailed information.

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

07/05/2026

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

Santé/Médecine - LES SYMPTOMES DE LA FIBROMYALGIE: 8. LE SYNDROME DE L'INTESTIN IRRITABLE (SII ) - (10/12)


Beaucoup de personnes qui luttent contre la maladie souffrent aussi du syndrome de l’intestin irritable (SII). Le SII est plus rare chez ceux qui luttent contre la fibromyalgie, mais aussi gênant que les autres symptômes de cette liste. En effet, le SII provoque de nombreux troubles digestifs, y compris : 

- diarrhées, 
- ballonnements, 
- constipation et 
- douleurs abdominales.
CommentEconomiser

06/05/2026

Astronomy - THE RETROGRADE DANCE OF SATURN AND NEPTUNE

 2026 May 6

The image shows two parellel rings of bright dots in the night sky. This is a composite image of the positions Saturn and Neptune traced in the sky from May 2025 to January 2026. The brighter ring in the foreground is Saturn, while the dimmer ring in the background is Neptune. Please see the explanation for more detailed information.

The Retrograde Dance of Saturn and Neptune
Image Credit & Copyright: Tunç Tezel (TWAN)
Text: Keighley Rockcliffe (NASA GSFCUMBC CSSTCRESST II)

Explanation: What does it mean for Saturn and Neptune to be in retrograde? Featured is a composite of images taken over 34 nights from May 2025 to February 2026 tracing Saturn (brighter, foreground) and Neptune (dimmer, background). Over that time, the two planets exhibited retrograde motion, meaning they appeared to move backward in the sky. This apparent backwards motion occurs when Earth overtakes the slower outer planets as they orbit the Sun. Imagine the Solar System is a running track. Earth "runs" faster along the inside of the track compared to the outer planets. As Earth approaches, aligns, and then "laps" the outer planets, they change position from ahead to behind from the Earth's perspective. This perspective shift is what causes the outer planets to change position in the night sky. An animation corresponding to today’s image shows Saturn and Neptune’s months-long dance across the northern night sky. Saturn stepped from the Pisces constellation into Aquarius and back again while Neptune remained in Pisces. This is the closest Saturn and Neptune have been in the sky since their last conjunction in 1989.

05/05/2026

Astronomy - ORION OVER MOUNT TEIDE

 2026 May 5

A starry sky is seen above a snowy volcano peak. The sky is
bright with many stars and red nebula. In the foreground is dark
soil and green evergreen trees. 
Please see the explanation for more detailed information.

Orion over Mount Teide
Image Credit & Copyright: Marcin Rosadziński

Explanation: Orion is rarely seen like this. To achieve this majestic vista, you need a camera capable of taking such long duration exposures that faint features in the night sky become revealed. Iconic nebulas that appear include the Orion Nebula, the Flame Nebula, and Barnard's Loop. For contrast, it also helps to have a volcano on the foreground, in this case the Teide volcano on Tenerife on the Canary Islands of Spain. But if you want your Teide volcano snow-covered, you also need good timing -- because that only happens, typically, for a few days each year. Good timing also includes waiting for Orion to appear just behind Teide, which occurred late last year after sunset. The featured image is the result of a series of images taken consecutively with the same camera from the same location.

Santé/Médecine - LES SYMPTOMES DE LA FIBROMYALGIE: 7. DES MAUX DE TÊTE (9/12)

La fibromyalgie a tendance à causer des maux de tête récurrents. Ceux-ci varient en intensité, et dans les cas les plus sévères apparaissent sous forme de fortes migraines. Parfois, ces maux de tête sont associés à d’autres symptômes, comme une sensation de vertige.

On pense que c’est dû aux tensions musculaires au cou et épaules. Et aussi à cause des perturbations à la sensation de douleur lorsque l’on souffre de cette maladie.

CommentEconomiser

04/05/2026

Astronomy - SUPERPLUMES INSIDE EARTH

2026 May 4

Superplumes Inside Earth
Image Credit & LicenseSanne Cottaar via Wikimedia Commons

Explanation: Why are there huge, unusual masses inside the Earth? No one is sure. By noting how earthquakes rumble through our planet's interior, humanity has discovered two deep structures that appear to have unusual temperatures and/or chemical compositions. One hypothesis holds that the superplumes are sunken debris left over from the Earth-shattering collision that created Earth's Moon about 4.5 billion years ago. A competing hypothesis is that they are graveyards for old tectonic plates that slowly slid under each other over the past few billion years. No matter their origin, the superplumes are thought to affect Earth’s surface volcanism, possibly creating, for example, island chains such as Hawaii. Also known as large low-shear-velocity provinces (LLSVPs), Earth's superplumes are visualized in the featured animation.

03/05/2026

Astronomy - TRIFID PILLARS AND JETS

 2026 May 3

A field of stars on the left is mirred by a wall of
opaque brown dust on the right. Jutting out from the wall is
a long pillar with a rounded end that has a prominent light-
colored jet emanating toward the upper left. The stellar 
background toward the upper left is dark blue.
Please see the explanation for more detailed information.

Trifid Pillars and Jets
Image Credit: NASAESASTScI; Processing: J. DePasquale (STScI)

Explanation: Dust pillars are like interstellar mountains. They survive because they are more dense than their surroundings, but they are slowly being eroded away by a hostile environment. Visible in the featured picture by the Hubble Space Telescope is the end of a huge gas and dust pillar in the Trifid Nebula (M20), punctuated by a smaller pillar pointing up and an unusual jet pointing to the upper left. Many of the bright dots are newly formed stars. A star near the small pillar's end is slowly being stripped of its accreting gas by radiation from a tremendously brighter star situated off the top of the image. The jet extends nearly a light-year and would not be visible without external illumination. As gas and dust evaporate from the pillars, the hidden stellar source of this jet will likely be uncovered, possibly over the next 20,000 years.

Santé/Médecine - LES SYMPTOMES DE LA FIBROMYALGIE: 6. DES TROUBLES DE LA MEMOIRE ET DE L'ATTENTION (8/12)

La maladie est aussi associée à des problèmes de fonctionnement cognitifs. Fréquemment, les personnes qui souffrent de fibromyalgie se plaignent de difficultés psychologiques, y compris : 

- problèmes de mémoire (surtout de difficultés à retenir des faits récents), 

- difficultés d’apprentissage, - baisse de l’attention, 

- difficulté à se concentrer et 

- difficultés d’expression, avec une élocution très lente, voire incompréhensible.

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 S...