Large grouping of stars within a galaxy center, surrounded by light blue dust and gas

C7 – Hubble Caldwell 7

Supernova hunters may be familiar with Caldwell 7 as the galaxy hosted a supernova in 2004.

Credits: NASA, ESA, A.V. Filippenko (University of California, Berkeley), P. Challis (Harvard-Smithsonian Center for Astrophysics), et al.