Thanks for this , needed a way to shut him up <| sep |> i think so tho my fren ' s still pending <| sep |> No Man ' s Sky ? Happy thanksgiving and enjoy the turkey <| sep |> Honestly , Rich Evans in any context always brings a smile to my face . Except maybe for when he ' s masturbating a droid . <| sep |> The Reynolds Pamphlet from hamilton <| sep |> You seem more upset than the guy you ' re replying to . <| sep |> The momentum must equal the radiation , because the momentum must equal the radiation ? What I said was that the momentum imparted to the spacecraft must equal the radiated momentum because momentum is conserved . This is not axiomatically true , but rather a theorem momentum is conserved because of the translational invariance of the laws of physics . If I plucked the entire solar system out of the milky way and placed it in the Andromeda galaxy , we ' d barely know the difference . That ' s what gives conservation of momentum . That momentum is conserved can be demonstrated rigorously from the equations of electromagnetism , by taking this translational invariance seriously . This is a special case of the celebrated theorem due to Noether .