Man can fly in space at maximum speed with today’s technology, or fly a spacecraft. According to current records, the fastest man’s speed was 39897 km / hr, just months before the Apollo 10 orbiting the moon (test flight) to return to Earth. The starship is expected to break, as it is expected to reach speeds above 40000km / hr on its way to Mars. This speed is not enough for us tomorrow. Let me give you a little hint. The particle accelerators we have built can push particles at 99.9% of the speed of light. A strong electric field and a magnetic field are at work. If a large accelerator like this could pull the ship off the ground altogether. Anyway we are not going to get anywhere in this petrol hit course. It must reach Mars in a matter of seconds or hours. Gravity must be defeated in the future.