Summary:

- Astronomers have unveiled a massive dataset of 3,628 supernovae, which are the explosive deaths of massive stars. This is the largest catalog of supernovae ever compiled.

- The dataset could help rewrite our understanding of cosmic history, as supernovae are important cosmic events that can be used to measure the expansion of the universe and the distribution of dark matter.

- The supernovae were observed by the Dark Energy Survey over a 6-year period, providing an unprecedented look at these cosmic explosions and their role in shaping the universe.