Giant Star Seen 150 Days Before it Exploded as a Supernova

Supernovae are relatively rare. It might not seem like it, but that’s because they’re so bright we can see them in other galaxies a great distance away. In fact, in 2022, astronomers spotted a supernova over 10 billion light-years away. Any time astronomers spot a supernova, it’s an opportunity to learn more about these rare, …