"sphere" - key terms from Wikipedia

armillary sphere
bloch sphere
blue sphere
bounding sphere
celestial sphere
circles on the sphere
circumscribing sphere
cultural sphere
dyson sphere
earth sphere
earth sphere	federation
earth was a sphere
eternal sphere
first sphere
geodesic sphere
hollow sphere
hubble sphere
inner sphere
landing sphere
odin sphere
original sphere
outer sphere
part of the public sphere
payload sphere
perfect sphere
personnel sphere
photon sphere
pressure sphere
public sphere
ray sphere
riemann sphere
second sphere
silicon sphere
sphere
sphere	and cylinder
sphere	break
sphere	builders
sphere	component
sphere	grid
sphere	of influence
sphere	of plutonium
sphere	sound
sphere	surfaces
sphere	with radius
third sphere
twelve point sphere
two sphere	surfaces intersecting
unit sphere
volume of a sphere
w on our sphere