05 November 2019
Scientists and engineers must overcome a great many difficulties to send a manned mission to Mars, Pang Zhihao, a space technology researcher in Beijing said. "First of all, Mars is very far from Earth - the closest distance is 55 million kilometers, which means a round trip will take more than 500 days. Second, putting a manned rocket into the Earth-Mars transfer trajectory will require it to be able to fly at the escape velocity, or 11.2 km per second." Other factors that should be taken into consideration include disturbances in communication between a Mars-bound spacecraft and Earth, sources of energy to sustain operations on Mars and astronauts' health risks caused by a lengthy stay on Mars.
MORE...