Going to Mars is non-trivial, since both planets revolve around the Sun and are hence in constant motion relative to each other. Earth and Mars are at their closest distance relative to each other every 26 months — and this is when Earthlings try to send missions to Mars. Every two years since the 1960s, different space agencies have sent missions to Mars. Between 1976 and 1992, many launch windows remained unutilised. On occasion, there have been multiple missions in ...
Read More