celestial sphere

noun 0.723

planisphere

noun 0.630

astrolabe

noun 0.598

sphere

noun 0.579

horosphere

noun 0.578

asphere

noun 0.558

spherical mirror

noun 0.553

planetarium

noun 0.552

orrery

noun 0.551

spheroidal

noun 0.549

homology sphere

noun 0.543

sundial

noun 0.540

spiral arm

noun 0.539

globe

noun 0.529

sphere of knowledge

noun 0.526

spheroid

noun 0.526

planetary ring

noun 0.521

hypersphere

noun 0.521

artificial horizon

noun 0.520

spherical geometry

noun 0.519

heliosphere

noun 0.515

geosphere

noun 0.514

spherule

noun 0.512

sextant

noun 0.510

gyroscope

noun 0.510

magnetic compass

noun 0.505

armorial

noun 0.504