Magnetic Fields can be used, and Magnetoplasmadynamic Thrusters may become the method for propulsion to send humans to other planets.
Aircraft fly through air and spacecraft fly in space.
The Apollo rockets
Multi Stage Rockets.
To answer this question ask yourself where do airplanes fly and where do spacecraft fly? You can see most airplanes which fly overhead, but spacecraft fly much higher. Airplanes fly within the earth's atmosphere, while spacecraft fly outside the earth's atmosphere in space. So when you decide to ask a sensible question, post it and you may receive a answer.
the Friendship 7 spacecraft
they fly at least 17000mph
fly
No, it wouldn't fit.
An object in motion will continue to move at the same speed and in the same direction unless some force acts on it. So there is no need to continuously fire rockets in space. That is only needed if the spacecraft needs to change speed or direction. When spacecraft is on orbit, gravity constantly pulls it toward the object it is orbiting, but it is moving fast enough that, in simple terms, it will constantly miss.
To but pressure for it can fly high
Marc Halili told us that we need to fly rockets because know about space , we also have to invent something. by mark
Challenger