GCSE Physics

A Star Is Born

Meanwhile, the compression exerted by the surrounding mass* continues to increase. If enough mass gathers, the force of gravity exceeds the force of repulsion between the hydrogen nuclei and makes these nuclei "fuse". This produces helium and an awful lot of heat - which sustains the hydrogen fusion.

At last a star is born.

GCSE PhysicsEarth & Universe Menu GCSE PhysicsGo to next page