in our solar system , every planets revolve in elliptical path and their shapes is almost oval or approaches to Sphere .
Sun is also looks like Sphere .
Question: Why everything trying to approaches Circle or Sphere?
My teachers says that even gravitational field, electric feild are somewhere looks like they are traveling in form of Sphere and he tell me that Everything things in this universe wants to Loose their potential energy that why they form Sphere
Then my next question comes in my mind that Why Spheres shapes tries to maintain Low potential energy?
Can anyone please enlighten me about why such things are happening as said in above two questions.