C57 (NGC 6822)

This Hubble Space Telescope image shows a field of stars in the galaxy’s outskirts. The galaxy’s center is out of the frame, toward the upper left. The image was taken with the Wide Field Channel on Hubble’s Advanced Camera for Surveys, which uses two detector chips that have a space between them, leaving a long, dark gap in the image. Astronomers made these observations to study Caldwell 57’s stellar populations in an effort to better understand the galaxy’s history of star formation and the evolution of dwarf galaxies.