Assertion: star's planet | /r/HasProperty | discovered
Facets:
Source sentences:
text: As small planets in the outer Solar System were discovered they w ere naturally found to have volatile - rich tops like comets.
text: Most of the new planets that have been discovered are believed to be gas giants several times the size of Jupiter.
text: More than 4,000 planets orbiting other stars have been discovered while a crash like this had never been observed.