“It has enough gravity to keep an astronaut from drifting away.” You do believe what ever you want. I believe man stand and walk on the moon are very fake. I’m not scientist or physics, I’m just ordinary man and am deaf. I observation the video of man stand and walk on the moon plus a current astronaut jetpack with floating or gravity (whatever you call it)… Therefore man on the moon is absolutely drifting away. Suppose the astronaut jetpack are very near to the moon but suddenly the jetpack stop working, will he fall down to the moon like a man fell off the helicopter to the ocean? Phphph!