ASTRONOMY - NGC 7714: Starburst after Galaxy Collision

 2024 March 17

NGC 7714: Starburst after Galaxy Collision
Image Credit: NASA, ESA, Hubble Legacy Archive;
Processing & Copyright: Rudy Pohl

Explanation: Is this galaxy jumping through a giant ring of stars? Probably not. Although the precise dynamics behind the featured image is yet unclear, what is clear is that the pictured galaxy, NGC 7714, has been stretched and distorted by a recent collision with a neighboring galaxy. This smaller neighbor, NGC 7715, situated off to the left of the frame, is thought to have charged right through NGC 7714. Observations indicate that the golden ring pictured is composed of millions of older Sun-like stars that are likely co-moving with the interior bluer stars. In contrast, the bright center of NGC 7714 appears to be undergoing a burst of new star formation. The featured image was captured by the Hubble Space Telescope. NGC 7714 is located about 130 million light years away toward the constellation of the Two Fish (Pisces). The interactions between these galaxies likely started about 150 million years ago and should continue for several hundred million years more, after which a single central galaxy may result.

SANTé/MEDECINE - La résonance magnétique révèle les vaisseaux du cerveau

Qu'est-ce donc que cet embrouillamini de fils et de tuyaux ? En mesurant la résonance magnétique des noyaux d'hydrogène présents dans le sang en mouvement, on a pu obtenir ce cliché révélant les vaisseaux sanguins qui alimentent le cerveau et le reste du crâne.

© IR4M, CNRS, université Paris-Sud

FuturaSciences

SANTé/MEDECINE - HISTOIRE - L'autopsie du corps humain durant la Renaissance

Avec la Renaissance, le nombre d'autopsies et d'études anatomiques sur des cadavres humains a considérablement augmenté.

© Leçon d'anatomie du docteur Tulp, Rembrandt, 1632, huile sur toile

ASTRONOMY - ELT and the Milky Way

 2024 March 16

ELT and the Milky Way
Image Credit & License: European Southern Observatory - Courtesy: Jens Scheidtmann

Explanation: The southern winter Milky Way sprawls across this night skyscape. Looking due south, the webcam view was recorded near local midnight on March 11 in dry, dark skies over the central Chilean Atacama desert. Seen below the graceful arc of diffuse starlight are satellite galaxies of the mighty Milky Way, also known as the Large and Small Magellanic clouds. In the foreground is the site of the European Southern Observatory's 40-metre-class Extremely Large Telescope (ELT). Under construction at the 3000 metre summit of Cerro Armazones, the ELT is on track to become planet Earth's biggest Eye on the Sky.

SANTé/MEDECINE - Cancer du sein : attention à ces 5 symptômes - Une inversion du mamelon (2/5)

 

Un autre signe doit vous interroger : lorsque votre mamelon commence à s’inverser et s’enfoncer vers l’intérieur. Cela peut vouloir dire qu’une tumeur se développe dans le sein et qu’elle tire une partie du tissu mammaire vers elle, indique la médecin.

CaMinteresse

ASTRONOMY - Portrait of NGC 1055

 2024 March 15

Portrait of NGC 1055
Image Credit & Copyright: Dave Doctor

Explanation: Big, beautiful spiral galaxy NGC 1055 is a dominant member of a small galaxy group a mere 60 million light-years away toward the aquatically intimidating constellation Cetus. Seen edge-on, the island universe spans over 100,000 light-years, a little larger than our own Milky Way galaxy. The colorful, spiky stars decorating this cosmic portrait of NGC 1055 are in the foreground, well within the Milky Way. But the telltale pinkish star forming regions are scattered through winding dust lanes along the distant galaxy's thin disk. With a smattering of even more distant background galaxies, the deep image also reveals a boxy halo that extends far above and below the central bulge and disk of NGC 1055. The halo itself is laced with faint, narrow structures, and could represent the mixed and spread out debris from a satellite galaxy disrupted by the larger spiral some 10 billion years ago.

SANTé/MEDECINE - Cancer du sein : attention à ces 5 symptômes - Un sein rouge et gonflé, chaud au toucher (1/5)

Cela peut être le signe d’une infection ou d’une inflammation systémique. Chez certaines femmes, la texture de la peau ressemble à celle d’une orange. “Cette texture alvéolée pourrait être un symptôme d’un cancer du sein inflammatoire, une forme rare et agressive de cancer du sein. Pour déterminer la cause de votre symptôme, vous devez contacter votre médecin généraliste pour une évaluation et un diagnostic.”

CaMinteresse

ASTRONOMY - Moon Pi and Mountain Shadow

 2024 March 14

Moon Pi and Mountain Shadow
Image Credit & Copyright: Daniel Lopez (El Cielo de Canarias)

Explanation: What phase of the Moon is 3.14 radians from the Sun? The Full Moon, of course. Even though the Moon might look full for several days, the Moon is truly at its full phase when it is Pi radians (aka 180 degrees) from the Sun in ecliptic longitude. That's opposite the Sun in planet Earth's sky. Rising as the Sun set on March 9, 2020, only an hour or so after the moment of its full phase, this orange tinted and slightly flattened Moon still looked full. It was photographed opposite the setting Sun from Teide National Park on the Canary Island of Tenerife. Also opposite the setting Sun, seen from near the Teide volcano peak about 3,500 meters above sea level, is the mountain's rising triangular shadow extending into Earth's dense atmosphere. Below the distant ridge line on the left are the white telescope domes of Teide Observatory. Again Pi radians from the Sun, on March 25 the Full Moon will dim slightly as it glides through Earth's outer shadow in a penumbral lunar eclipse.

SANTé/MEDECINE - HISTOIRE - 1561 : Ambroise Paré, le père de la chirurgie moderne

Considéré comme le père de la chirurgie moderne, Ambroise Paré est l'inventeur d'instruments chirurgicaux. Il a mis au point la ligature des artères, qui remplacera la cautérisation. En 1561 et 1562, Ambroise Paré publie un ouvrage intitulé Anatomie universelle du corps humain.

© William Holl

FuturaSciences

ASTRONOMY - The Seagull Nebula

 2024 March 13

The Seagull Nebula
Credit & Copyright: Gianni Lacroce

Explanation: A broad expanse of glowing gas and dust presents a bird-like visage to astronomers from planet Earth, suggesting its popular moniker: the Seagull Nebula. This portrait of the cosmic bird covers a 1.6-degree wide swath across the plane of the Milky Way, near the direction of Sirius, the alpha star of the constellation of the Big Dog (Canis Major). Of course, the region includes objects with other catalog designations: notably NGC 2327, a compact, dusty emission and reflection nebula with an embedded massive star that forms the bird's head. Dominated by the reddish glow of atomic hydrogen, the complex of gas and dust clouds with bright young stars spans over 100 light-years at an estimated 3,800 light-year distance.