Scientists using the JWST have discovered and measured the mass of a galaxy that existed just 600 million years after the Big Bang.The Firefly Sparkle galaxy is similar in size to our Milky Way during its formation and has a unique brightness from 10 distinct star clusters.The galaxy's appearance, enhanced by gravitational lensing, resembles an elongated raindrop with clusters of stars spread unevenly.Interactions with two smaller galaxies nearby may contribute to Firefly Sparkle's future growth and evolution.