Astronomers using the James Webb Space Telescope have discovered a galaxy that challenges current understanding of the early universe.
The galaxy, named JADES-GS-z13-1, is seen as it was just 330 million years after the Big Bang, making it one of the oldest and most distant galaxies ever seen.
The galaxy's light contains a bright signal of Lyman-α radiation, which was unexpected because it was thought to be blocked by the neutral hydrogen fog of the early universe at that time.
Possible explanations include the presence of a huge bubble of ionized hydrogen or an active black hole in the galaxy.