Assertion: comet | /r/HasProperty | propelled by gas
Facets:
Source sentences:
text: Classifying the object as a comet explains its arcing movement and nongravitational acceleration, as comets can be propelled by gas they release.
text: Classifying the object as a comet explains its arcing movement and nongravitational acceleration, as comets can be propelled by gas they release.
text: Comets typically accelerate in this manner, propelled by the gases released by the heat of the Sun, which create their signature tails.