The Supernova by its nature is very unstable, and in constant risk of exploding. Technological advancement may help to keep the Supernova stable.
The Eclipse: Dawn for the New Galaxy Supernova is part of the Galactic Events expansion. The Supernova was also offered as an exclusive promo in the Dized Kickstarter campaign in 2019. This is the same Supernova that's included in the Galactic Events expansion with the exception that the Dized version has an additional Technology Tile. (Image: Dized Supernova expansion)
2 x Supernova hex
1 x Discovery tile (Exclusive to the Dized version of the expansion)