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A polar-ring galaxy is a type of galaxy with an outer ring of gas and stars that rotates over the poles of the galaxy. [1] These polar rings are thought to form when two galaxies gravitationally interact with each other. One possibility is that a material is tidally stripped from a passing galaxy to produce the polar ring. [2]
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]
The following table lists polar-ring galaxies: List. Image Galaxy Base galaxy type ... Some galaxies feature a "polar ring" within the disk of the galaxy: UGC 5600 ...
NGC 2685 (also known as the Helix Galaxy) is a lenticular and polar ring Seyfert Type 2 galaxy in the constellation Ursa Major.Its velocity with respect to the cosmic microwave background is 1003 ± 9 km/s, which corresponds to a Hubble distance of 48.2 ± 3.4 Mly (14.79 ± 1.05 Mpc). [1]
NGC 4650A is a polar-ring [2] lenticular [1] galaxy located in the constellation Centaurus. It should not be confused with the spiral galaxy NGC 4650, which shares almost the same radial distance as NGC 4650A. The real distance between both galaxies is only about 6 times the optical radius of NGC 4650.
The galaxy is characterised by the presence of dust lanes across the minor axis of the galaxy, indicating it is a polar-ring galaxy. [4] The galaxy has one central dust lane while three more less pronounced lanes are visible which look like concentric rings.
This is named after Art Hoag, who discovered this ring galaxy. [citation needed] It is of the subtype Hoag-type galaxy, and may in fact be a polar-ring galaxy with the ring in the plane of rotation of the central object. [citation needed] Knife Edge Galaxy: Draco: Named after its thin shape, similar to knife's edge. [citation needed] Large ...
NGC 4632 is a spiral galaxy in the constellation of Virgo.Its velocity with respect to the cosmic microwave background for is 2,061 ± 24 km/s, which corresponds to a Hubble distance of 99.2 ± 7.0 Mly (30.40 ± 2.16 Mpc). [1]