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NGC 6872
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NGC 6872, also known as the Condor Galaxy,〔 is a large barred spiral galaxy of type ' in the constellation Pavo. It is from Earth and is approximately five billion years old.〔 is interacting with the lenticular galaxy , which is less than one twelfth as large.〔〔 The galaxy has two elongated arms; from tip to tip, measures , making it one of the largest-known spiral galaxies.〔〔Papers by Eufrasio, ''et al.'', and citing these, NASA, repeatedly state that NGC 6872 is the largest known spiral galaxy, but various sources report that LSB galaxy Malin 1 is the largest spiral at across.〕 It was discovered on 27 June 1835 by English astronomer John Herschel.〔
== Star formation rates ==
When observed in the ultraviolet and mid-infrared, the central region and bar of show old stars and low rates of star formation, with rates increasing along the spiral arms as distance from the core increases. The most active region of star formation, located in the northeast arm, shows a stellar flux around 1,000 times higher than in the central region, though this may be affected by the density of stellar dust in the core. The extended portions of both arms exhibit young star cluster formations with ages ranging from one to one hundred million years. Star formation rates in the northeast extended arm are twice that of the southwest extended arm, and five times the formation rate in the sections of the arms closer to the central region.〔
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