Astronomers probed the molecular gas content and interstellar medium conditions of REBELS-25, a massive star-forming galaxy that existed only a few hundred million years after the Big Bang.

How this affects you

This discovery provides direct evidence that some galaxies in the early Universe were extremely rich in molecular gas, which is the fuel from which stars are born. Understanding these physical properties is essential for reconstructing the processes that led to the formation of the first galaxies and understanding the evolution of the Universe.