planetoid

noun 0.748

protoplanet

noun 0.705

minor planet

noun 0.670

inner planet

noun 0.658

dwarf planet

noun 0.642

terrestrial planet

noun 0.618

protoplanetary disk

noun 0.609

planetary

noun 0.608

planetary system

noun 0.604

meteoroid

noun 0.603

planet

noun 0.594

micrometeorite

noun 0.593

extrasolar planet

noun 0.592

protostar

noun 0.589

asteroid

noun 0.589

outer planet

noun 0.584

planetology

noun 0.582

micrometeoroid

noun 0.577

meteorite

noun 0.569

giant planet

noun 0.566

planetary science

noun 0.565

planetary nebula

noun 0.559

celestial object

noun 0.550

spherule

noun 0.543

gas giant

noun 0.540

protosun

noun 0.539

nanosphere

noun 0.530

meteor

noun 0.530

planetarium

noun 0.530

astroid

noun 0.527

spheroid

noun 0.525

cosmic dust

noun 0.522

planisphere

noun 0.519

spheroidal

noun 0.518

bolide

noun 0.518

planetary ring

noun 0.518

compact star

noun 0.517

ellipsoid

noun 0.515

moonlet

noun 0.510

elementary particle

noun 0.508

celestial sphere

noun 0.506

pluton

noun 0.505

microelement

noun 0.505

impact crater

noun 0.505

solar system

noun 0.505

primordium

noun 0.502

dwarf galaxy

noun 0.502

asphere

noun 0.501