Assertion: celestial sphere's center | /r/HasProperty | inside the earth
Facets:
Source sentences:
text: The Earth and Moon are much closer to being a binary planet; the center of mass around which they both rotate is still inside the Earth, but is about 4,624 km (2,873 mi) or 72.6% of the Earth's radius away from the centre of the Earth (thus closer to the surface than the center).[citation needed]