https://refractor.io/space/halo-orbit-selected-for-gateway-space-station/
Halo orbit selected for Gateway space station
Nov 6, 2019 - The Gateway deep-space station is still years away, but planners are zeroing in on the orbit it will travel in cis-lunar space. Called a Near-Rectilinear Halo...
halo orbitselectedgatewayspacestation
https://www.universetoday.com/articles/the-lunar-gateway-will-be-in-a-near-rectilinear-halo-orbit
The Lunar Gateway Will be in a "Near-Rectilinear Halo Orbit" - Universe Today
near rectilinear halo orbit