July – Luglio 13

Pubblicato da Laura Pulvirenti il

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astronomy bulletin of the day
il bollettino per gli astronaviganti

In 1762 the English astronomer James Bradley died, best known for the discovery of the aberration of light, which was announced to the Royal Society in January 1729 and which also provided the definitive experimental proof of the motion of the earth’s revolution.

Nel 1762 muore l’astronomo inglese James Bradley noto soprattutto per la scoperta dell’aberrazione della luce, che fu annunciata alla Royal Society nel gennaio 1729 e che fornì anche la prova sperimentale definitiva del moto di rivoluzione terrestre.  

Comet 6P/d’Arrest

In 1822 the German astronomer Heinrich Louis d’Arrest was born, known for having taken part in the research team of the planet Neptune, with Johann Gottfried Galle. On September 23, 1846, he suggested that a chart of the sky that had recently been drawn, in the position predicted by Urbain Le Verrier, could be compared to the stellar configuration of the time to establish the characteristic displacement of the planet, opposite to a fixed star. Neptune was discovered that same night. He also discovered a comet named after him (formally referred to as 6P/d’Arrest, see photo) and studied asteroids, discovering 76 Freia, and some nebulae

Nel 1822 nasce l’astronomo tedesco Heinrich Louis d’Arrest noto per aver preso parte alla squadra di ricerca del pianeta Nettuno, con Johann Gottfried Galle. Il 23 settembre 1846, suggerì che una carta del cielo che era stata recentemente tracciata, nella posizione prevista da Urbain Le Verrier, si sarebbe potuta paragonare alla configurazione stellare di allora per stabilire lo spostamento caratteristico del pianeta, in maniera opposta ad una stella fissa. Nettuno fu scoperto quella stessa notte. Scoprì anche una cometa che prese il suo nome (formalmente indicata come 6P/d’Arrest, vedi foto) e studió gli asteroidi, scoprendo 76 Freia, ed alcune nebulose

Carina nebula details, @JWST Telescope (ESA)

In 2022 the whole scientific world (and not only) was amazed by the splendid images that the James Webb Telescope gave us, of which here in the foreground a detail of the Carina nebula and yesterday the splendid photo released by ESA for the anniversary of the first JWST Telescope photo! To admire them all enter the link!

Nel 2022 tutto il mondo scientifico (e non solo) è rimasto a bocca aperta dalle splendide immagini e che ci ha regalato il James Webb Telescope di cui qui in primo piano un dettaglio della nebulosa della Carena e ieri la splendida foto rilasciata da ESA per l’anniversario della prima foto del JWST Telescope! Per ammirarle tutte entra dal link!

The first anniversary image from the NASA/ESA/CSA James Webb Space Telescope displays star birth like it’s never been seen before, full of detailed, impressionistic texture. The subject is the Rho Ophiuchi cloud complex, the closest star-forming region to Earth. It is a relatively small, quiet stellar nursery, but you’d never know it from Webb’s chaotic close-up. Jets bursting from young stars crisscross the image, impacting the surrounding interstellar gas and lighting up molecular hydrogen, shown in red. Some stars display the telltale shadow of a circumstellar disc, the makings of future planetary systems. The young stars at the centre of many of these discs are similar in mass to the Sun or smaller. The heftiest in this image is the star S1, which appears amid a glowing cave it is carving out with its stellar winds in the lower half of the image. The lighter-coloured gas surrounding S1 consists of polycyclic aromatic hydrocarbons, a family of carbon-based molecules that are among the most common compounds found in space. [Image description: Red dual opposing jets coming from young stars fill the darker top half of the image, while a glowing pale-yellow, cave-like structure is bottom centre, tilted toward two o’clock, with a bright star at its centre. The dust of the cave structure becomes wispy toward eight o’clock. Above the arched top of the dust cave three groupings of stars with diffraction spikes are arranged. A dark cloud sits at the top of the arch of the glowing dust cave, with one streamer curling down the right-hand side. The dark shadow of the cloud appears pinched in the centre, with light emerging in a triangle shape above and below the pinch, revealing the presence of a star inside the dark cloud. The image’s largest jets of red material emanate from within this dark cloud, thick and displaying structure like the rough face of a cliff, glowing brighter at the edges. At the top centre of the image, a star displays another, larger pinched

Text source: Wikipedia, ESA

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