Investigating the Mars environment [Mars in the Future: http://futuristicnews.com/tag/mars/ Space Future: http://futuristicnews.com/category/future-space/ & http://futuristicshop.com/category/space-future-books/ NASA: http://futuristicnews.com/tag/nasa/]
Every US space mission from Mercury to Apollo-Soyuz with astronauts color-coded by selection group./ have you ever wondered why we have never had a manned space mission outside the earth's orbit in over 40 years?!?!?
This diagram shows our cosmic address at a glance. We see our planetary system around the Sun, our stellar neighborhood in our galaxy, our galaxy in the local group of galaxies, and our group in the entire universe.