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Stellar life cycle
Intermediate
Stars are born, fuse elements and die based on mass.
Stars form from collapsing gas clouds, burn hydrogen on the main sequence for most of their lives, then swell into red giants. Low-mass stars become white dwarfs; massive stars explode as supernovae and leave neutron stars or black holes.
Lifetime ∝ M⁻²·⁵: massive stars live millions of years.
Mass determines fate.
In more detail
Stars form from clouds of gas and dust, shine by fusion, and evolve depending on their mass. Low-mass stars end as white dwarfs, while massive stars end as neutron stars or black holes.
Real-world uses
- Stellar evolution explains the origin of elements in the universe.
- Astronomers classify stars by their life stages.
- Astronomers explain the colours and brightness of stars by how they evolve through their lifetimes.
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Frequently asked questions
What determines a star's fate?
Mainly its mass, which sets its temperature and rate of fusion.
How long do stars live?
From millions of years for massive stars to trillions of years for small red dwarfs.
Does a star's mass decide its fate?
Yes. A star's initial mass largely determines how it burns fuel, how long it lives and whether it ends as a white dwarf, neutron star or black hole.
Related topics in Particle Physics & Cosmology
Supersymmetry · String theory · Our Sun · Hertzsprung–Russell diagram · Stellar nucleosynthesis · Supernovae