Space Regulatory Glossary Orbital Mechanics

cislunar

/sɪsˈluːnər/ adjective

1. Of or relating to the region of space between Earth and the Moon, including lunar orbit. Cislunar space encompasses all Lagrange points in the Earth-Moon system.
2. An increasingly important domain for space policy as NASA's Artemis program and commercial lunar missions expand activity beyond low Earth orbit.

Related terms

Lagrange point One of five positions in a two-body orbital system (such as Earth-Sun or Earth-Moon) where the gravitational forces and… LEO Low Earth orbit. An orbit around Earth at altitudes between approximately 160 km and 2,000 km.

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