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Gravity and pressure in stars

Gravity and pressure in stars

Diagram showing inward self-gravity balanced by outward gas pressure in a stable star

Gravity pulls a star's material inward, while hot gas pressure from the fusion-heated core pushes outward. When these effects balance, the star is in hydrostatic equilibrium and keeps a steady size.

7.3 Stars Lesson

  1. GCSE
  2. /Physics
  3. /7.3 Stars

Step-by-step lessons on Edexcel GCSE Physics 7.3 Stars. Each one builds up to exam-style questions. Master the required practical work and core equations early, since both papers can draw on content and maths skills from across the whole specification.

Lessons