America is building a rocket that will reach Mars in just 45 days. It still takes at least a year. In fact, China is constantly challenging America and the whole world in space missions. America wants to go beyond that. NASA has planned to build a nuclear-fueled rocket that will take spacecraft or humans to Mars in just 45 days.
No astronaut of any country has reached the lower layer of the earth or any other planet so far, but not only a rocket but many new technologies will be needed to reach Mars, such as life support system, radiation shielding, power and propulsion system. etc. The biggest source of power and propulsion systems is nuclear fuel.
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