Derek Richards
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NGC 4631 (the Whale Galaxy or Caldwell 32) is a spiral galaxy, 30 million ly away in Canes Venatici. It has a central starburst, and is interacting with dwarf elliptical galaxy NGC 4627. The pair together is ARP 281

NGC 4631 (the Whale Galaxy or Caldwell 32) is a spiral galaxy, 30 million ly away in Canes Venatici. It has a central starburst, and is interacting with dwarf elliptical galaxy NGC 4627. The pair together is ARP 281

This NASA image shows NGC 5194. M51's stretch of over 60,000 light-years dwarf its companion galaxy, NGC 5195. Credit: Hubble Space Telescope, NASA.

This NASA image shows NGC 5194. M51's stretch of over 60,000 light-years dwarf its companion galaxy, NGC 5195. Credit: Hubble Space Telescope, NASA.

The Sombrero Galaxy is an unbarred spiral galaxy in the constellation Virgo located 28 million light-years from Earth.

The Sombrero Galaxy is an unbarred spiral galaxy in the constellation Virgo located 28 million light-years from Earth.