Scientists have simulated the violent collisions between supernovae and its surrounding gas -- which is ejected before a supernova explosion, thereby giving off an extreme brightness.

Possibly triggering a mass extinction.

This could help improve measurements of the universe’s expansion.

Supernova remnants are some of the most extreme environments in the universe.

This bombardment of debris may have even changed Earth’s climate.

There are just two possible sources in the universe, and neither is on Earth.