Assertion: telescope's instrument | /r/HasProperty | taken to high altitude
Facets:
value: by balloons
type: OTHER
Source sentences:
text: X-radiation is absorbed by the Earth's atmosphere, so instruments to detect X-rays must be taken to high altitude by balloons, sounding rockets, and satellites.
text: Satellites are needed because X-radiation is absorbed by the Earth's atmosphere, so instruments to detect X-rays must be taken to high altitude by balloons, sounding rockets, and satellites.