Assertion: terrestrial planet's star | /r/HasProperty | rich
Facets:
value: more metal
type: DEGREE
value: clearly
type: DEGREE
Source sentences:
text: Spectroscopic studies of systems where exoplanets have been found to date confirm the relationship between high metal content and planet formation: "Stars with planets, or at least with planets similar to the ones we are finding today, are clearly more metal rich than stars without planetary companions.