A round body
ball, globule, orb; see circle 1.
The celestial sphere
heavens, sky, planetary sphere, primum mobile (Latin).
province, compass, sphere of influence, walk of life, field.
"sphere." YourDictionary, n.d. Web. 17 August 2018. <http://thesaurus.yourdictionary.com/sphere>.
sphere. (n.d.). Retrieved August 17th, 2018, from http://thesaurus.yourdictionary.com/sphere
An area within which something or someone exists, acts, or has influence or power: