Assertion: stardust | /r/HasProperty | fourth discovery mission
Facets:
Source sentences:
text: STARDUST is the fourth Discovery mission and will be the first United States sample return mission beyond the Mars orbit.
text: Stardust, the fourth Discovery mission, is sending a spacecraft to fly through the cloud of dust that surrounds the nucleus of a comet -- and, for the first time ever, bring cometary material back to Earth.