Supernova Remnant: Cooking Elements In The LMC . ... Credit Copyright: J. Morse ( STScI ) and NASA Explanation: Massive stars cook elements in their cores through nuclear fusion . ... In fact, the elements making up life on Earth were baked in such a stellar oven! ... It reveals luminous clouds of cooked supernova debris energized by shocks -- singly ionized sulfur appears red, doubly ionized oxygen, green, and singly ionized oxygen, blue. ... NASA Web Site Statements, Warnings, and Disclaimers . ...