Assertion: km | /r/HasProperty | 50 mi
Facets:
Source sentences:
text: 32.1869 km 30 mi 48.2803 km 40 mi 64.3738 km 50 mi 80.4672 km 60 mi 96.5606 km 70 mi
text: 32.18688 km 50 mi, mi(Int)
text: It extends from the mesopause (which separates it from the mesosphere) at an altitude of about 80 km (50 mi; 260,000 ft) up to the thermopause at an altitude range of 500–1000 km (310–620 mi; 1,600,000–3,300,000 ft).
text: Taking its name from the Greek θερμός (pronounced thermos) meaning heat, the thermosphere begins at about 80 km (50 mi) above sea level.