In practise though a person would need a propellant that would travel faster than light, in the future just maybe it will be possible!
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miyuki & kyojin say: You are quite ignorant of science. Speed of sound and speed of light quite different. Your reasoning is bad. Advances of technology have limits. They can never achieve impossible tasks. You have magical thinking, is illogical. Experiments support Theory of relativity. If you can actually refute it, you easily win Nobel prize of physics. You are just ignorant person not know science, not know logic. Lorentz equations show inertial mass become infinite at speed of light, certainly matter can never travel at near speed of light let alone faster. Fuel is problem too. Hydrogen fusion produce immense energy but we cannot contain it. Even if can ever contain and direct it, still infinite regress of amount spaceship must carry. You not even begin comprehend physics and mathematics involved.
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say: Because science doesn't know everything, they can only measure and theories, hypothesis is based off what they already know. Not what they don't know.
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someg say: Of course there is something faster than light - greased light.
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Quý An say: ...
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Satan Claws say:
Mass becoming infinite at the speed of light is just a theory
You means to say "supposition" or "guess", not "theory". In sciences, a theory describes an interpretation of all knowledge available.
Anyway, when you build particle accelerators for research or for medicine for example (PET scanners), you have to design the magnets that guide the particles taking into account their speeds and their masses. If you had assumed that the mass did not depend on the speed of the particle, they simply wouldn't work (the particles would punch through the machine instead of staying in the guided orbit). Therefore, we know it isn't "just a guess".
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