ecosphere

noun 0.635

horosphere

noun 0.626

event horizon

noun 0.616

heliosphere

noun 0.605

geosphere

noun 0.585

geospace

noun 0.575

heliosheath

noun 0.557

orbit

noun 0.555

rhizosphere

noun 0.550

space environment

noun 0.546

photosphere

noun 0.543

cosmological horizon

noun 0.543

pedosphere

noun 0.542

noosphere

noun 0.541

mycorrhizosphere

noun 0.539

anthroposphere

noun 0.536

ionosphere

noun 0.522

ellipsoid

noun 0.521

radiation belt

noun 0.514

black hole

noun 0.509

edge of the earth

noun 0.508

globus

noun 0.506

hypersphere

noun 0.506

ellipsoid of revolution

noun 0.506

sphere of knowledge

noun 0.505

biosphere

noun 0.505

orbital

noun 0.504

asphere

noun 0.503

habitable zone

noun 0.501