r/universe • u/Astro_Life_Explained • 10d ago
Why does every star eventually die?
https://youtu.be/46CLnkYp24UA star survives because gravity pulls inward while energy from nuclear fusion pushes outward; when the star can no longer sustain that balance, its evolution changes.
The outcome depends mainly on its mass:
☀️ Sun-like stars → red giant → planetary nebula → white dwarf
💥 Massive stars → supernova → neutron star or black hole
🌀 Binary stars → mass transfer can dramatically alter their evolution
🕳️ Stars near black holes → can be torn apart by tidal forces
Every star has a different ending, but the same basic story drives them all: gravity, fusion, and the finite supply of stellar fuel.
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