Technology

Voici une vue d'artiste d'un trou noir dérivant dans notre Galaxie, la Voie lactée. Le trou noir est le reste écrasé d'une étoile massive qui a explosé en supernova. Le noyau survivant est de plusieurs fois la masse de notre Soleil. Le trou noir piège la lumière en raison de son champ gravitationnel intense. Le trou noir déforme l'espace qui l'entoure, ce qui déforme les images d'étoiles d'arrière-plan alignées presque directement derrière lui. Cet effet de « lentille » gravitationnelle offre la seule preuve révélatrice de l'existence de trous noirs solitaires errant dans notre Galaxie, dont la population pourrait atteindre 100 millions. Le télescope spatial Hubble part à la recherche de ces trous noirs en recherchant la distorsion de la lumière des étoiles lorsque les trous noirs dérivent devant les étoiles de fond. © ESA, Hubble, Digitized Sky Survey, Nick Risinger (skysurvey.org), N. Bartmann

We are beginning to detect wandering black holes scattering across the Milky Way

He stars more than 8 masses will not end in white dwarf but exploding supernovae SNII. Those with masses above 20/30 solar masses should not expel enough subject matter in the explosion so that thecollapse gravitation most often gives a neutron star, but rather a stellar black hole. The observed have masses between 5 and …

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📰 Pioneering marine bacteria in the degradation of fresh macroalgae

📰 Pioneering marine bacteria in the degradation of fresh macroalgae

Macroalgae are major producers of organic matter in coastal areas. Scientists were interested in the strategies implemented by a marine bacterium to attack fresh macroalgal tissues and initiate their degradation. Understanding these degradation mechanisms offers promising tools seen (Sight is the sense that allows you to observe and analyze the environment through the reception and …

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Fluorescence microscopy shows how living cells form vesicles to carry charge as growth factors

Fluorescence microscopy shows how living cells form vesicles to carry charge as growth factors

Cells have an intelligent way of carrying charge, such as growth factors, across the cell membrane and into the cell. This is called clathrin-mediated endocytosis. Clathrin protein molecules congregate inside the cell membrane and distort it to form what looks like a fossa from the outside. Once filled with charge, the well is pinched to …

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