Hubble Observes Early Universe Starburst Galaxy Emitting UV Light

The Hubble Space Telescope has detected ionizing ultraviolet light from MXDFz4.4, a starburst galaxy significantly smaller than the Milky Way, just 1.4 billion years after the Big Bang. This observation offers astronomers an unprecedented view of cosmic reionization, a critical period when the universe transitioned from opaque gas to transparency. The findings provide crucial data on the early evolution of the cosmos.