#JamesWebb is an active hashtag on Bluesky. In the last 30 days, 22 people shared 53 posts with it — around 2 a day. Activity is down 13% versus the previous week, peaking on Aug 23 with 4 posts.
Tags most often used together with #JamesWebb.
www.futura-sciences.com
Le télescope James-Webb perce le brouillard de poussière d’une galaxie parmi les plus actives proches de nous
Le télescope spatial James-Webb a observé une galaxie située à 13 millions d'années-lumière de nous avec, en son centre, un trou noir supermassif source de rayonnement infrarouge.
omniletters.com
Telescópios Hubble e Webb identificam novos objetos além de Netuno
en.killbait.com
James Webb Telescope Observes Potential New Astronomical Phenomenon: Black Hole Star
The James Webb Space Telescope (JWST) has detected unusual 'little red dots' in its images, which have sparked a scientific debate about their nature. According to reports from Quanta magazine and Phys.org, these red dots appear to be a new type of astronomical object that combines characteristics of both black holes and stars, tentatively called a 'black hole star.' The phenomenon was observed in two separate surveys conducted by astronomers, with the red dots appearing consistently across multiple images. The key discovery came from analyzing the spectral data of these dots, which showed a unique pattern in hydrogen emissions. Typically, such spectral smearing indicates the presence of an exposed black hole, as the intense gravitational forces cause hydrogen clouds to emit varying colors based on their speed. However, these particular dots were too bright to be ordinary stars and didn't match the expected ring-like structures of black holes. Instead, researchers led by de Graaff and Naidu propose that they are observing the first examples of a 'black hole star'—a theoretical object where a black hole at the core drives the outward energy and light, similar to how nuclear fusion powers our Sun. The black hole would pull gas around it, heating it and pushing light and energy outward, preventing the outer hydrogen layers from collapsing inward. This process would form the 'engine' of the star, analogous to the Sun's core. The researchers suggest this could represent the 'birth' of potentially every massive black hole in the universe. However, the scientific community remains divided, with some astronomers questioning the interpretation. Recent simulations using the Japanese Supercomputer ATERUI III have provided an alternative explanation, suggesting that the 'Little Red Dots' (LRDs) are actually rapidly growing black holes from the early universe. These simulations show that in the early universe, intense far-ultraviolet radiation from nearby galaxies suppressed star formation in gas clouds, leading to the formation of single supermassive stars that collapsed into black hole seeds. These black hole seeds are surrounded by dense gas disks that trap radiation, enabling them to grow at rates dozens of times faster than possible in the modern universe. The simulated properties of these rapidly growing black holes match the observations made by JWST, offering a more conventional explanation without requiring exotic assumptions. The debate continues as astronomers analyze the data, with the JWST observations providing unprecedented insights into the early universe and the formation of black holes.
omniletters.com
Pesquisadores desenvolvem método para verificar clima em exoplaneta
2tout2rien.fr
Herbig-Haro 211 : les jets d’une « étoile bébé » vus par James Webb
À environ 1 000 années-lumière de la Terre, dans la constellation de Persée, Herbig-Haro 211 offre une image spectaculaire des toutes premières étapes de la vie d’une étoile. Mais il y a un petit p…
omniletters.com
Estudo revela história de objetos transnetunianos pela superfície
www.tutiempo.net
El telescopio James Webb revela un impresionante panorama de formación estelar | Tutiempo.net
El telescopio James Webb ha captado la región de formación estelar IC 348, descubriendo las enanas marrones más pequeñas conocidas y misteriosos hidrocarburos.
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