Hubble image of Arp 70, also known as VV 341.
Like its more famous cousin M51 (Arp 85, the Whirlpool galaxy), Arp 70 consists of a larger galaxy with two well-defined spiral arms interacting with a small companion. Such interactions have been linked to the production of grand-design spiral arms.
Credit: NASA, ESA, STScI, J. Dalcanton, Judy Schmidt
Source: https://www.flickr.com/photos/geckzilla/48320643492/