planetesimal

noun 0.748

asteroid

noun 0.741

minor planet

noun 0.731

astroid

noun 0.720

dwarf planet

noun 0.711

meteoroid

noun 0.694

terrestrial planet

noun 0.653

protoplanet

noun 0.639

inner planet

noun 0.637

planet

noun 0.637

spheroid

noun 0.630

outer planet

noun 0.626

planetology

noun 0.624

planetary

noun 0.622

ellipsoid

noun 0.592

meteorite

noun 0.588

planetary system

noun 0.585

orbiter

noun 0.582

extrasolar planet

noun 0.581

spheroidal

noun 0.569

orbital

noun 0.568

pluton

noun 0.568

orbit

noun 0.564

micrometeoroid

noun 0.564

orbital plane

noun 0.555

giant planet

noun 0.554

celestial object

noun 0.553

achondrite

noun 0.551

asphere

noun 0.549

planetary nebula

noun 0.547

planetary science

noun 0.544

planetary ring

noun 0.542

bolide

noun 0.539

protoplanetary disk

noun 0.533

ellipsoid of revolution

noun 0.532

planetarium

noun 0.531

suborbital

noun 0.527

dwarf spheroidal

noun 0.526

micrometeorite

noun 0.526

planisphere

noun 0.524

dispersoid

noun 0.524

plantlet

noun 0.521

plankton

noun 0.521

spherule

noun 0.520

geode

noun 0.520

space satellite

noun 0.519

saturn

noun 0.516

ovoid

noun 0.516

organoid

noun 0.513

heavenly body

noun 0.512

island

noun 0.510

viroid

noun 0.510

paraboloid

noun 0.509

atomic orbital

noun 0.509

landform

noun 0.507

sputnik

noun 0.507

chondrite

noun 0.507

space junk

noun 0.507

periastron

noun 0.505

plane

noun 0.505

orrery

noun 0.504

ooid

noun 0.503

otolith

noun 0.503

epicycle

noun 0.502

polyhedron

noun 0.501

meteor

noun 0.501

platelet

noun 0.501

planchet

noun 0.500

gas giant

noun 0.500