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Hubble sights galaxy stuck in the middle

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Hubble sights galaxy stuck in the middle

Post by Dragon on Tue May 01, 2018 12:43 am


Credit: ESA/Hubble & NASA, A. Fillipenko

This pretty, cloud-like object may not look much like a galaxy—it lacks the well-defined arms of a spiral galaxy, or the reddish bulge of an elliptical—but it is in fact something known as a lenticular galaxy. Lenticular galaxies sit somewhere between the spiral and elliptical types; they are disk-shaped, like spirals, but they no longer form large numbers of new stars and thus contain only aging populations of stars, like ellipticals.

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Re: Hubble sights galaxy stuck in the middle

Post by Dragon on Tue May 01, 2018 12:46 am

Seyfert galaxies account for about 10% of all galaxies[3] and are some of the most intensely studied objects in astronomy, as they are thought to be powered by the same phenomena that occur in quasars, although they are closer and less luminous than quasars. These galaxies have supermassive black holes at their centers which are surrounded by accretion discs of in-falling material. The accretion discs are believed to be the source of the observed ultraviolet radiation. Ultraviolet emission and absorption lines provide the best diagnostics for the composition of the surrounding material

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Re: Hubble sights galaxy stuck in the middle

Post by Dragon on Tue May 01, 2018 12:49 am


NASA, Andrew S. Wilson (University of Maryland); Patrick L. Shopbell (Caltech); Chris Simpson (Subaru Telescope); Thaisa Storchi-Bergmann and F. K. B. Barbosa (UFRGS, Brazil); and Martin J. Ward (University of Leicester, U.K.)

Resembling a swirling witch's cauldron of glowing vapors, the black hole-powered core of a nearby active galaxy appears in this colorful NASA Hubble Space Telescope image. The galaxy lies 13 million light-years away in the southern constellation Circinus. This galaxy is designated a type 2 Seyfert, a class of mostly spiral galaxies that have compact centers and are believed to contain massive black holes.

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Re: Hubble sights galaxy stuck in the middle

Post by Dragon on Tue May 01, 2018 12:50 am



Seyfert galaxies are one of the two largest groups of active galaxies, along with quasars.

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