So where to they have a vacuum that equals that of space, with various kinds of cosmic radiation, with sunlight that is hundreds of degrees, and shade that is negative hundreds of degrees, and can simulate various gravity on the moon, orbiting the moon, and the acceleration and deceleration the lunar lander would experience?

With satellites, the '3 body problem' proves there is no simulator capable of keeping 3 or more bodies in a perpetual orbit, so how the hell do they keep satellites in orbit around the earth, when you have gravity impacting it from the sun and moon as well? That's 4 bodies not counting anything else in the solar system.

So where to they have a vacuum that equals that of space, with various kinds of cosmic radiation, with sunlight that is hundreds of degrees, and shade that is negative hundreds of degrees, and can simulate various gravity on the moon, orbiting the moon, and the acceleration and deceleration the lunar lander would experience?