Large grouping of stars and bluish dust and gas. Near the center the stars create a bright white light. Galaxy is a amorphous blob.

Hubble Caldwell 21

Discovered in 1788 by astronomer William Herschel, Caldwell 21 is dwarf irregular galaxy bursting with forming stars.

Credits: NASA, ESA, A. Aloisi (STScI/ESA), and the Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration