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Loading contentHow a star is born from a collapsing cloud, forges the elements of the periodic table in its core, and ends as a white dwarf, neutron star, or black hole. Built on well-established astrophysics; nothing is fabricated.
Stars are born when the densest cores of a giant molecular cloud become unable to support themselves against their own gravity and collapse. As a core falls inward it heats, spins up into a disc, and grows a central protostar — a process that can be triggered by the shock of a nearby supernova or the squeeze of a spiral arm.
The single most important diagram in stellar astrophysics: a plot of stars' luminosities against their surface temperatures. Stars are not scattered at random but fall into distinct regions — the diagonal main sequence, the giant and supergiant branches, and the faint white-dwarf sequence — that trace the arc of stellar evolution.
The rapid capture of neutrons that forges the heaviest elements — gold, platinum, the lanthanides, and uranium. It demands an intense flood of neutrons in a fraction of a second, conditions found when two neutron stars merge, an origin confirmed by the kilonova that followed the 2017 gravitational-wave event GW170817.
A quantum-mechanical pressure that arises because electrons, by the Pauli exclusion principle, resist being packed too closely — independent of temperature. It supports white dwarfs against gravity, but only up to the Chandrasekhar limit of about 1.4 solar masses, beyond which even degeneracy fails and the star collapses further.