Arp 220 is the result of a collision between two galaxies which are now in the process of merging. It is the 220th object in Halton Arp's Atlas of Peculiar Galaxies.
Wider angle (2.4′ ) view by Hubble Space Telescope
Compound view shows an ALMA Band 5 image of the colliding galaxy system Arp 220.
Shining like a brilliant beacon amidst a sea of galaxies, Arp 220 lights up the night sky in this view from the James Webb Space Telescope.
Halton Christian "Chip" Arp was an American astronomer. He is remembered for his 1966 book Atlas of Peculiar Galaxies, which catalogued unusual looking galaxies and presented their images.
Halton Arp in London, October 2000
Halton Arp (right) and his grandsons, 2008
Arp 230, also known as IC 51, observed by the NASA/ESA Hubble Space Telescope.