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ESO

La cena di una galassia cannibale
21 Nov 2009 - 12:32 | Alessandra Valentini (traduzione)

Una nuova tecnica che utilizza immagini nel vicino infrarosso, ottenute mediante il New Technology Telescope (NTT) dell’ESO da 3,58 metri, consente agli astronomi di vedere attraverso le strisce di polvere opaca della gigantesca galassia cannibale Centaurus A, svelando con un grado di dettaglio senza precedenti il suo “ultimo pasto” - una galassia più piccola, attualmente ritorta e deformata. Questa straordinaria immagine mostra anche migliaia di ammassi stellari, sparsi come gemme lucenti, che si muovono all’interno di Centaurus A.

Identificata una bomba stellare pronta ad esplodere
17 Nov 2009 - 20:33 | Giulia Ricciotti (traduzione)

Usando il Very Large Telescope dell’ESO e la sua abilità per ottenere immagini così nitide come se fossero state prese dallo spazio, gli astronomi hanno ottenuto il primo filmato a rallentatore di uno strato di materia piuttosto inusuale espulso da una “stella vampiro”, che nel Novembre 2000 subì un’esplosione dopo aver inglobato parte della materia della sua compagna.

Trifid Triple Treat
26 Ago 2009 - 21:35

Today ESO has released a new image of the Trifid Nebula, showing just why it is a firm favourite of astronomers, amateur and professional alike. This massive star factory is so named for the dark dust bands that trisect its glowing heart, and is a rare combination of three nebula types, revealing the fury of freshly formed stars and presaging more star birth.

A Look into the Hellish Cradles of Suns and Solar Systems
19 Ago 2009 - 17:18

New images released today by ESO delve into the heart of a cosmic cloud, called RCW 38, crowded with budding stars and planetary systems. There, young stars bombard fledgling suns and planets with powerful winds and blazing light, helped in their task by short-lived, massive stars that explode as supernovae. In some cases, this onslaught cooks away the matter that may eventually form new solar systems. Scientists think that our own Solar System emerged from such an environment.

Double Engine for a Nebula
5 Ago 2009 - 12:54

ESO has just released a stunning new image of a field of stars towards the constellation of Carina (the Keel). This striking view is ablaze with a flurry of stars of all colours and brightnesses, some of which are seen against a backdrop of clouds of dust and gas. One unusual star in the middle, HD 87643, has been extensively studied with several ESO telescopes, including the Very Large Telescope Interferometer (VLTI). Surrounded by a complex, extended nebula that is the result of previous violent ejections, the star has been shown to have a companion. Interactions in this double system, surrounded by a dusty disc, may be the engine fuelling the star’s remarkable nebula.

A Glimpse of the Young Milky Way. VLT UVES Observes Most Metal-Deficient Star Known
30 Ott 2002 - 23:33

A faint star in the southern Milky Way, designated HE 0107-5240 , has been found to consist virtually only of hydrogen and helium . It has the lowest abundance of heavier elements ever observed , only 1/200,000 of that of the Sun – 20 times less than the previous record-holding star.

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