IC 3583: Una Spolverata Blu di Stelle

Pubblicato 05/12/2016 | Da Barbara Bubbi

This delicate blue group of stars — actually an irregular galaxy named IC 3583 — sits some 30 million light-years away in the constellation of Virgo (The Virgin). It may seem to have no discernable structure, but IC 3583 has been found to have a bar of stars running through its centre. These structures are common throughout the Universe, and are found within the majority of spiral, many irregular, and some lenticular galaxies. Two of our closest cosmic neighbours, the Large and Small Magellanic Clouds, are barred, indicating that they may have once been barred spiral galaxies that were disrupted or torn apart by the gravitational pull of the Milky Way. Something similar might be happening with IC 3583. This small galaxy is thought to be gravitationally interacting with one of its neighbours, the spiral Messier 90. Together, the duo form a pairing known as Arp 76. It’s still unclear whether these flirtations are the cause of IC 3583’s irregular appearance — but whatever the cause, the galaxy makes for a strikingly delicate sight in this NASA/ESA Hubble Space Telescope image, glimmering in the blackness of space.

La straordinaria galassia ripresa in questa immagine del telescopio Hubble, chiamata IC 3583, ha l’aspetto delicato di una spolverata blu di stelle, un insieme di lucenti astri raccolti in un mirabile raggruppamento. Continua a leggere→

Contrassegnato Arp 76, astronomia, formasione stellare, galassia, galassia irregolare, galassie barrate, IC 3583, interazione tra galassie, Messier 90, telescopio Hubble