My theory:
Water is the cover story. NASA is using the moon as a target range, to practice shooting alien parasitic invasion craft and/or asteroids. Then the moon will look like this (pop culture reference to manipulate our consciousness - for those into visuals? - or a preknowing from the 1970's? unconscious? conscious?).
Worst case scenario, a parasitic invasion: They're already here, just more are coming. NASA sees itself as a white blood corpuscle ("good guys"), which is debatable. It's hard to know who's the parasite.
Five[1] different and diverse types of leukocytes exist, but they are all produced and derived from a multipotent cell in the bone marrow known as a hematopoietic stem cell.
White blood cells (WBCs), or leukocytes