terrestrial planet

noun 0.770

outer planet

noun 0.747

minor planet

noun 0.685

protoplanet

noun 0.664

planetesimal

noun 0.658

planet

noun 0.648

dwarf planet

noun 0.643

planetoid

noun 0.637

planetary

noun 0.632

giant planet

noun 0.614

planetary system

noun 0.613

extrasolar planet

noun 0.609

gas giant

noun 0.568

interplanetary space

noun 0.556

planetary science

noun 0.550

planetology

noun 0.546

protoplanetary disk

noun 0.546

venus

noun 0.542

asteroid

noun 0.534

solar system

noun 0.530

terra firma

noun 0.528

planetary ring

noun 0.527

terrestrial

noun 0.521

planetary nebula

noun 0.518

protosun

noun 0.518

iron meteorite

noun 0.517

saturn

noun 0.517

earth

noun 0.513

meteoroid

noun 0.511

mercury

noun 0.510

protostar

noun 0.506

perihelion

noun 0.506

pluton

noun 0.505