Assertion: coma | /r/MadeOf | dust
Facets:
value: generally
type: DEGREE
Source sentences:
text: The coma is generally made of water and dust, with water making up to 90% of the volatiles that outflow from the nucleus when the comet is within 3 to 4 astronomical units (450,000,000 to 600,000,000 km; 280,000,000 to 370,000,000 mi) of the Sun.