Life Cycle of a Massive Star

🚀 Life Cycle of a Massive Star

Stars much more massive than the Sun (10 or more solar masses) follow a more dramatic path. Their greater gravity means they burn through their fuel much faster — a star 20 times more massive than the Sun lives only about 10 million years compared to the Sun's 10 billion years.

1. Red supergiant: Like a sun-like star, the massive star runs out of core hydrogen and expands — but into a much larger red supergiant. The core becomes hot enough to fuse progressively heavier elements: helium, carbon, neon, oxygen, silicon, and finally iron. Each fusion stage is shorter than the last.
2. Supernova: Iron cannot release energy through fusion (it actually absorbs energy). When the core fills with iron, fusion stops entirely. The core collapses catastrophically in less than a second, releasing an enormous amount of energy. The shock wave blasts the outer layers away in a supernova explosion — briefly outshining an entire galaxy. The explosion creates all elements heavier than iron (gold, platinum, uranium) through rapid neutron capture.
3. Neutron star: If the remaining core mass is between about 1.4 and 3 solar masses, gravity compresses it so forcefully that protons and electrons are pushed together to form neutrons. The result is a neutron star — a city-sized object with the mass of the Sun, so dense that a teaspoon would weigh about a billion tonnes.
4. Black hole: If the remaining core mass exceeds about 3 solar masses, not even neutron pressure can resist gravity. The core collapses into a black hole — a region of space with such intense gravity that nothing, not even light, can escape.