Assertion: telescope's use | /r/HasProperty | expensive
Facets:
value: prohibitively
type: DEGREE
Source sentences:
text: Using a monolithic mirror much larger than the 5-meter Hale or 6-meter BTA-6 is prohibitively expensive due to the cost of both the mirror, and the massive structure needed to support it.
text: Using a monolithic mirror much larger than 5 meters is prohibitively expensive due to the cost of both the mirror, and the massive structure needed to support it.