Related terms:
gas giants
oort cloud
earth masses
sistema solar
kuiper belt
outer layers
outer planets
scattered disc
galactic centre
asteroid belt
orbital resonance
solar system
outer solar system
interstellar space
inner solar system
terrestrial planets
interstellar medium
Wikipedia sources:
Gas giant
Solar System
Sailor Starlights
Formation and evolution of the Solar System
Context for words:
uranus
and
neptune
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