Assertion: km | /r/HasProperty | 50–53 mi; 260,000–280,000 ft
Facets:
Source sentences:
text: It extends from the stratopause at an altitude of about 50 km (31 mi; 160,000 ft) to the mesopause at 80–85 km (50–53 mi; 260,000–280,000 ft) above sea level.