terrestrial planet; telluric planet; rocky planet
planetary alignment; syzygy
interplanetary cruise; planetary travel
artificial planet; man-made planet
planetary system; star system
rocky planet; terrestrial planet
gas giant (Jupiter, Saturn); giant planet (Jupiter, Saturn, Uranus, Neptune); Jovian planet
major planet; giant planet; Jovian planet
ice giant (Uranus, Neptune)
terrestrial planet; rocky planet