News to me:
Edge of space is: 73 miles (118 kilometers) above Earth'ssurface
"Supra-Thermal Ion Imager detected the boundaryby tracking the relatively gentle winds of Earth'satmosphere and the more violent flows of charged particles in space, whichcan reach speeds well over 600 mph (1,000 kph)... Others point out that the "NowEntering Space" sign should be posted way out at 13 million miles (21million kilometers) because that's the boundarywhere Earth's gravity is no longer dominant"
Many used to consider it as 62 miles (100 kilometers)
NASA'smission control uses 76 miles (122 kilometers)
Astronauts have been using 50-mile (80-kilometer)
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