if astronauts empty water or air into space Will are planet shift do to the change in mass?

Question

the planet is placed by its mass so if it's weight changes we souldd move right

Answer 1

Yes. Everything is affected by gravity, so even that little glass of water would slightly displace the orbit of, let's say, Earth. This would only change its orbit a few nanometers, but it would still SLIGHTLY change the orbit. You are correct, sir.

Answer 2

Our planet receives thousands of tons of space debris every year in the form of dust and meteorites. Don't think a few gallons of water will make much difference.

Answer 3

Not enough to notice.