A supernova represents the spectacular explosion of a star, marking one of the most energetic events in the universe. White Dwarfs and Thermonuclear Runaway For stars with a mass up to about eight times that of the Sun, the end involves shedding their outer layers.
Supernova Simple Definition Heavy Elements: How Massive Stars Forge the Building Blocks of Planets and Life
Fusion continues in layers like an onion, creating iron in the core. Accumulating too much mass triggers a runaway nuclear reaction, completely obliterating the white dwarf in a Type Ia supernova.
Iron cannot be fused to release energy. Observing the Burst of Light The explosion emits a phenomenal amount of electromagnetic radiation across the spectrum.
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This collapse rebounds off the dense core, generating a shockwave that expels the outer layers into space. Type Trigger Progenitor Star Type Ia Thermonuclear explosion of a white dwarf White dwarf in a binary system Core-Collapse Core implosion due to iron accumulation Massive star (8+ solar masses).
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