*Earth System not to scale

Critical Orbit Points | Distance Above Earth (mean sea level)
The Kármán line is a proposed conventional boundary between Earth’s atmosphere and outer space at an altitude of 100 km.

Low Earth orbit (LEO) is normally at an altitude of less than 1000 km but could be as low as 160 km above Earth.
High Earth orbit (HEO) is defined as an altitude higher than 35,786 km.

Also referred to as a geosynchronous equatorial orbit, a circular geosynchronous orbit is 35,786 km in altitude above Earth’s equator and follows the direction of Earth’s rotation.