Spiral galaxy NGC 3521 is olny 35 million light-years from Earth, toward the constellation Leo. Spanning some 50,000 light-years, the galaxy sports characteristic patchy, irregular spiral armslaced with dust, pink star forming regions, and clusters of young, blue stars. This deep image shows NGC 3521 embedded in gigantic bubble-like shells. The shells are likely tidal debris, streams of stars torn from satellite galaxies that have undergone mergers with NGC 3521 in the distant past.
Image Credits: R Jay Gabany (Blackbird Obs.), Collaboration: David Martinez-Delgado (MPIA, IAC), et al.
Source: The Daily Galaxy