Page 9, Star Formation & Structure: [Previous Page] [Next Page] [Class Home Page] Text Pages 289

• (Most) Stars are not expanding or contracting..

  
  

  
  

• Stars are in equilibrium..

  
  

  
  

• The Downward force of Gravity is balanced by the Outward force of Pressure.

  
  

  
  

  THIS IS HYDROSTATIC EQUILIBRIUM