Adjective
circumlunar (not comparable)
Surrounding, or traveling around the Moon
Apollo 13 was close to entering the lunar sphere of gravitational influence (at 61 hours GET), which was the break-even point between direct and circumlunar aborts, and the latter allowed more time for evaluation and planning before a major rocket burn. Source: Internet
It shows a red figure-8 looping around the Earth and Moon representing the mission number as well as the circumlunar nature of the mission. Source: Internet