Assertion: spacecraft | /r/HasProperty | impactor
Facets:
value: beginning with luna
type: OTHER
value: for study of consequences of impact
type: PURPOSE
Source sentences:
text: The two spacecraft (Impactor and Flyby) and the three main instruments were built and integrated by Ball Aerospace & Technologies in Boulder, Colorado.
text: but for study of consequences of impact, the spacecraft is called an impactor.
text: Beginning with Luna 2 in 1959, the first few spacecraft to reach the lunar surface were impactors, not landers.