Assertion: terrestrial planet's material | /r/HasProperty | ejected by impact
Facets:
value: on mars
type: LOCATION
Source sentences:
text: More-recent lines of evidence for Phobos having a highly porous interior, and suggesting a composition containing mainly phyllosilicates and other minerals known from Mars, point toward an origin of Phobos from material ejected by an impact on Mars that reaccreted in Martian orbit, similar to the prevailing theory for the origin of Earth's moon.