Assertion: comet | /r/MadeOf | water ice
Facets:
Source sentences:
text: Comets are made of volatile materials like water ice, dry ice and carbon monoxide ice, with a bit of dust, rock, rubble and metal mixed in They form in the outer reaches of planetary systems, where it's cold enough for these materials to be solid rather than gas
text: Comets are made of volatile materials like water ice, dry ice and carbon monoxide ice, with a bit of dust, rock, rubble and metal mixed in They form in the outer reaches of planetary systems, where it's cold enough for these materials to be solid rather than gas