ionosonde

noun 0.652

stratosphere

noun 0.649

troposphere

noun 0.639

noosphere

noun 0.635

ozone layer

noun 0.621

ecosphere

noun 0.620

photosphere

noun 0.616

biosphere

noun 0.607

lithosphere

noun 0.607

lower atmosphere

noun 0.590

ozone

noun 0.585

pedosphere

noun 0.583

cryosphere

noun 0.579

aeronomy

noun 0.575

atmosphere

noun 0.575

geosphere

noun 0.573

heliosphere

noun 0.572

geospace

noun 0.561

horosphere

noun 0.561

photoion

noun 0.560

tropopause

noun 0.558

anthroposphere

noun 0.545

ion

noun 0.544

ozone hole

noun 0.539

ozone shield

noun 0.539

iridium

noun 0.534

isotherm

noun 0.531

airglow

noun 0.531

rhizosphere

noun 0.529

interstellar space

noun 0.527

ison

noun 0.525

stratopause

noun 0.522

ergosphere

noun 0.522

mycorrhizosphere

noun 0.519

solar corona

noun 0.516

celestial sphere

noun 0.513

outer space

noun 0.512

hydrosphere

noun 0.512

radiation belt

noun 0.511

hemisphere

noun 0.511

ionization

noun 0.511

photoionisation

noun 0.509

ice core

noun 0.508

iodine

noun 0.507

surface layer

noun 0.507

semiosphere

noun 0.506

particle horizon

noun 0.505

plasma

noun 0.505

heliosheath

noun 0.504

tropospheric scatter

noun 0.504

epidermis

noun 0.504

iris

noun 0.501

biozone

noun 0.500