The Explosion at the End of a Star's Life Cycle
This page is the CodyCross answer for the clue below from Space Exploration, Group 912, Puzzle 4 (Galilean Moons).
Question is: The Explosion at the End of a Star's Life Cycle
and the answer is: SUPERNOVA
Word Meaning:
SUPERNOVA — (astronomy) A powerful and bright explosion of a massive star, which afterwards becomes a neutron star or a black hole, or is destroyed.
Definitions from Wiktionary.