The boundaries between the Earth's surface and outer space, at the Kármán line, 100 km (62 mi) & exosphere at 690 km (430 mi).Outer space (often called space) comprises the relatively empty regions of the universe outside the atmospheres of celestial bodies. Outer space is used to distinguish it from airspace and terrestrial locations. Utilizing a new instrument developed by scientists at the University of C
calgary, scientists have found that space begins 73 miles (118km) above Earth.[1]

From Wikipedia