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A ring galaxy is a galaxy with a circle-like appearance. Hoag's Object, discovered by Arthur Hoag in 1950, is an example of a ring galaxy. [1] The ring contains many massive, relatively young blue stars, which are extremely bright. The central region contains relatively little luminous matter. Some astronomers believe that ring galaxies are ...
The cartwheel galaxy, galaxy pair AM 2026-424, and Arp 147 are all examples of ring galaxies believed to be formed from this process. In pass-through galactic collisions, an often smaller galaxy will pass through the disc of an often larger spiral, causing an outward push of the arms, as if dropping a rock into a pond of still water.
The ring structure is so perfect and circular that it has been referred to as "The most perfect ring galaxy". [7] The diameter of the 6 arcsecond inner core of the galaxy is about 17 ± 0.7 kly ( 5.3 ± 0.2 kpc ) while the surrounding ring has an inner 28″ diameter of 75 ± 3 kly ( 24.8 ± 1.1 kpc ) and an outer 45″ diameter of 121 ± 4 kly ...
NGC 1291, also known as NGC 1269, [4] is a ring galaxy with an unusual inner bar and outer ring structure located about 33 million light-years away in the constellation Eridanus. [1] It was discovered by James Dunlop in 1826 and subsequently entered into the New General Catalogue as NGC 1291 by Johan Ludvig Emil Dreyer .
The Cartwheel Galaxy (also known as ESO 350-40 or PGC 2248) is a lenticular ring galaxy about 500 million light-years away in the constellation Sculptor. [1] It has a D 25 isophotal diameter of 44.23 kiloparsecs (144,300 light-years), and a mass of about 2.9–4.8 × 10 9 solar masses ; its outer ring has a circular velocity of 217 km/s .
Hubble Space Telescope image of NGC 660. NGC 660 is a peculiar and unique polar-ring galaxy located approximately 45 million light-years from Earth in the Pisces constellation. [3] It is the only such galaxy having, as its host, a "late-type lenticular galaxy". [4] It was probably formed when two galaxies collided a billion years ago. [5]
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Pages in category "Ring galaxies" The following 56 pages are in this category, out of 56 total. ... Cartwheel Galaxy; E. ESO 198-13; ESO 269-57; H. Hoag's Object; I ...