Vacuum

Under unknown circumstances, the gravity of the earth satellite disappeared. Unprecedented cataclysms hit the earth A third of animal species has been exterminated. Loss of the world's population of 1.7 billion people. A group of scientists was sent to the lunar surface to find out the reason for the lack of gravity. During a research mission. The astronaut will find himself in the midst of an interplanetary invasion between two kinds of extraterrestrial civilizations. In the absence of gravity and oxygen, will the hero be able to defeat the army of invaders and save his home?