Notizie di Esteri in tempo reale - Pag. 535

Guerra Russia-Ucraina, imposto il coprifuoco a Kiev: i cittadini scappano“Protezione temporanea” per i profughi ucraini approvata dall’Ue, cosa significa Nelle piazze della Russia migliaia di arresti di manifestanti contro la guerra

Notizie di Esteri in tempo reale - Pag. 545Spazio,ETF pronto al lancio il 26 agosto il telescopio a Raggi-X Xrism di Askanews   21-08-2023 - 15:48 Link copiato Loading... 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background-color: #fff; border-radius: 0.5rem; box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12); font-family: sans-serif; content: 'Loading...'; display: flex !important; font-size: 13px; font-weight: bold; line-height: 1; justify-content: center; min-height: 50px; text-transform: uppercase;}#speakup-player:empty{ display: block;} Tanegashima, 21 ago. (askanews) - Conoscere l'Universo studiando.... l'arcobaleno. Il telescopio orbitante a Raggi-X Xrism (X-Ray Imaging and Spectroscopy Mission) è pronto per essere lanciato nello Spazio il 26 agosto 2023 dalla base spaziale di Tanegashima, in Giappone. Per i prossimi 3 anni almeno, potrà osservare gli oggetti e gli eventi più energetici del cosmo, svelando i misteri dell'evoluzione dell'Universo e la struttura dello Spazio-tempo.La missione è frutto di una collaborazione tra l'Agenzia spaziale giapponese Jaxa e l'americana Nasa, con una partecipazione significativa dell'Esa, l'Agenzia spaziale europea.Lavorando a temperature prossime allo zero assoluto (-273 gradi centigradi) e grazie ai suoi 2 strumenti scientifici: lo spettrometro "Resolve" e il sensore d'immagini a Raggi-X "Xtend", Xrism misurerà (scomponendola) la luce a Raggi-X proveniente da oggetti incredibilmente densi come i buchi neri supermassicci attivi che si trovano al centro di alcune galassie per capire come deformano lo spazio-tempo circostante e in che misura influenzano le galassie ospiti. Quando osserviamo il cielo, infatti, vediamo stelle e galassie che ci dicono relativamente poco sul funzionamento dell'Universo. Invisibile ai nostri occhi, invece, il gas che emette Raggi-X e che si trova all'interno di queste galassie - e tra queste - può rivelare molto di più.Grazie al fatto che ciascun elemento chimico riflette la luce in modo differente, inoltre, le osservazioni di Xrism forniranno anche informazioni su come l'Universo li ha prodotti e distribuiti. Il gas caldo all'interno degli ammassi è un residuo della nascita e della morte delle stelle. Studiando i Raggi-X emessi dal gas, Xrism scoprirà quali e quanti "metalli" (cioè, gli elementi più pesanti dell'Idrogeno e dell'Elio) contiene, delineando una mappa di come sono stati distribuiti nell'Universo.Xrism, infine, rappresenta un trait d'union tra altre missioni a Raggi-X dell'ESA come Xmm-Newton che continua a funzionare perfettamente dopo 24 anni nello Spazio e Athena, il cui lancio è previsto per la seconda metà degli anni 2030. di Askanews   21-08-2023 - 15:48 Link copiato Commenti Leggi la Netiquette

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