Assertion: astronomer's observation | /r/HasProperty | augmented by observation
Facets:
value: from long-range space probes
type: OTHER
value: from orbiting satellites
type: OTHER
Source sentences:
text: In the future, space missions may return surface materials from Mars, or other objects, but much of astronomy appears otherwise confined to Earth-based observations augmented by observations from orbiting satellites and long-range space probes and supplemented by theory.