Assertion: moon | /r/HasProperty | sphere
Facets:
Source sentences:
text: Some ancient peoples believed the moon was a bowl of fire, while others thought it was a mirror that reflected Earth's lands and seas, but ancient Greek philosophers knew the moon was a sphere orbiting the Earth whose moonlight reflected sunlight.
text: The ancient Greek astronomer Hipparchus was one of the first to think that the Moon was a sphere or globe.
text: The moon is a sphere that travels once around Earth every 27.3 days.