Will Intergalactic Travel Ever Be Possible?
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A number of techniques have been developed to make interplanetary flights more economical. Advances in computing and theoretical science have already improved some techniques, while new proposals may lead to improvements in speed, fuel economy, and safety.
What does it mean to travel between planets?
Cutaway diagram of the Apollo Applications Project Venus flyby spacecraft. Interplanetary spaceflight or interplanetary travel is travel between planets, usually within a single planetary system. In practice, spaceflights of this type are confined to travel between the planets of the Solar System .