A grouping of blue and reddish stars against the black background of space.

C107 (NGC 6101)

This image of the globular cluster Caldwell 107, or NGC 6101, combines observations taken in visible, infrared, and ultraviolet light by Hubble’s Wide Field Camera 3 and its Advanced Camera for Surveys. The stars in Caldwell 107 are more loosely packed than those in other globular clusters, which usually have dense, compact cores.

Credits: NASA, ESA, G. Piotto (Università degli Studi di Padova), and A. Sarajedini (Florida Atlantic University); Processing: Gladys Kober (NASA/Catholic University of America)