Summary:
- Astronomers have studied a rare phenomenon called an "Einstein Cross" to learn more about a young galaxy that contains surprisingly old stars.
- An Einstein Cross is a unique gravitational lensing effect where a distant galaxy's light is bent and magnified by the gravity of a closer galaxy, creating four distinct images of the background galaxy.
- By analyzing the properties of this Einstein Cross, the researchers were able to determine that the young galaxy is about 11 billion years old and contains stars that are even older, providing new insights into the early history of galaxy formation.