Arp 104
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Template:Short description Template:Infobox Galaxy
Arp 104, also known as Keenan's system, is entry 104 in Halton Arp's Atlas of Peculiar Galaxies catalog for spiral galaxy NGC 5216 and globular galaxy NGC 5218.[1] The two galaxies are joined by a bridge of galactic material spanning 22 000 light years.[1][2]
In 1790 William Herschel discovered the galaxies, and in 1926 they were studied by Edwin Hubble.[1] In 1935 Philip C. Keenan first published a paper about the bridge connecting the galaxies,[1][3] which was rediscovered in 1958 at the Lick and Palomar observatories.[1][2][4]
References
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External links
- Template:Sister-inline
- Astronomy Picture of the Day
- Galaxies on a String - 2008 July 31
- Galaxies on a String - 2010 July 2