GCSE Physics

A Protostar

The kinetic energy of the particles' activity turns into heat and the sphere starts to glow, so soon it becomes a protostar. (A protostar is a star in its first stage of development.)

At 3,000 kelvin*, a protostar's core will be hot enough for its atoms to ionise*, leaving only positively-charged hydrogen and helium nuclei.


GCSE PhysicsEarth & Universe Menu GCSE PhysicsGo to next page