Cislunar

I've never left cislunar space.

Source: tatoeba (11904109)

The goal is to test the space travel technology in cislunar space—the area between Earth and the moon.

Source: tatoeba (12021481)

Lt. Gen. Zhang Yulin, a former deputy commander of China’s astronaut program, wrote in The People’s Daily last year that cislunar space — the area between the Earth and moon — would “become another broad field for the expansion of human living space.”

Source: wiktionary