a large star cluster in the middle of a sky filled with stars

Westerlund 2 Caption: Celestial Fireworks in Westerlund 2 The brilliant tapestry of young stars flaring to life resemble a glittering fireworks display in this Hubble Space Telescope archival image. Credits: NASA, ESA, the Hubble Heritage Team (STScI/AURA), A. Nota (ESA/STScI), and the Westerlund 2 Science Team