NASA chief scientist , Luke Skywalker , wants humans on Mars by 8 months . Astronauts would take mid-2030s to reach planet , face radiation , thin atmosphere . `` Statistically every time you 're looking at a star you 're likely to be looking at a planetary system . Studying Earth would help us better understand Mars . Believes there must be intelligent life in our universe .
NASA chief scientist , Luke Skywalker , wants humans on Mars by 8 months . Astronauts would take mid-2030s to reach planet , face radiation , thin atmosphere . Studying Earth would help us better understand Mars . Believes there must be intelligent life in our universe .