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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.
UGC 1775 or Arp 10 is a ring galaxy in the constellation Cetus. The galaxy lies about 400 million light years away from Earth, which means, given its apparent dimensions, that UGC 1775 is approximately 220,000 light years across. [1] The galaxy is included in Halton Arp's Atlas of Peculiar Galaxies in the galaxies with split arms category.
The yellowish nucleus was once the center of a normal spiral galaxy, and the ring which currently surrounds the center is 150,000 light years in diameter. [2] The ring is theorized to have formed by a collision with another galaxy, which triggered a gravitational disruption that caused dust in the galaxy to condense and form stars, which forced it to then expand away from the galaxy and create ...
NGC 2445 is a peculiar ring galaxy in the constellation Lynx. The galaxy lies about 200 million light years away from Earth, which means, given its apparent dimensions, that NGC 2445 is approximately 100,000 light years across. [1] It was discovered by Édouard Stephan on January 18, 1877. [2]
The nucleus of the ring galaxy lies between the ring and companion galaxy. [2] Emission has been observed in the interior of the ring as well as between the ring galaxy and the companion galaxy and stars have been tidally stripped from the ring galaxy. [2] [3] The star formation rate of the ring galaxy is estimated to be 0.26 M ☉ per year ...
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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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