A galaxy in the early universe was rich with oxygen, astronomers have found. The discovery raises questions about how early life could have first appeared in the universe.
As missions like Kepler and TESS discovered more rocky exoplanets in recent years, scientists looked forward to the launch of the JWST. The powerful space telescope has the ability gather infrared spectra of exoplanet atmospheres, a key need in understanding the planets being discovered. It was hoped that these atmospheric characterizations would advance our understanding of habitability.

