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What is Arp?
Tabular overview
Photographic overview
Spiral galaxies (Arp 1-36)
Spiral galaxies with companions on arms (Arp 37-101)
Elliptical and elliptical-like galaxies (Arp 102-145)
Galaxies (not classifiable as S or E) (Arp 146-268)
Group character (Arp 269-332)
Miscellaneous (Arp 333-338)