At an altitude of about 100 miles, satellites can orbit the Earth. Here, true space may be said to begin. The farther regions of space are described by the bodies that limit them. Cislunar space is the area between the Earth and the moon. Interplanetary space lies between the sun and the planets of the solar system.
Interstellar space lies between the stars of a galaxy.
Amazing Universe III CD-Rom . Shareware Cd-Rom . Views of the Solar System CD-ROM . First 25 Years . Conquest of Space .