"George Kinley" writes:

Are there any way for rockets to fly in space , other then throwing mass
out in one direction and moving in other

1.) The _definition_ of a "rocket" is "something that throws mass
(or more precisely, _momentum_) out in one direction in order to
accelerate in the opposite direction." If it _doesn't_ "throw mass
out the back," it _ISN'T A ROCKET_.

2.) Anything that does _not_ "throw mass out the back" (or more precisely,
_momentum_) in order to accelerate would violate Newton's 3rd Law of Motion
(AKA, the conservation of Momentum). In 300 years, _NO ONE_ has observed
a replicatable violation of Conservation of Momentum.


-- Gordon D. Pusch

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