revolve around
phrasal verbrevolve around something 
(also revolve round something especially in British English)
- to move around something in a circle
- The earth revolves around the sun.
 
Extra Examples- Protons and electrons revolve around the nucleus.
 - People used to think that the sun revolved around the earth.
 
 
revolve around somebody/something 
(also revolve round somebody/something especially in British English)
- to have somebody/something as the main interest or subject
- His whole life revolves around surfing.
 - She thinks that the world revolves around her.
 - The discussion revolved around the question of changing the club's name.
 - The world doesn't revolve around you, you know.