err, 5 things:
NO2 is poisonous, you mean N2.
Tritium (helium-3) is the potentially valuable energy source - thes millions of tonnes of H already on earth in all the H2O.
the sun isnt a planet.
certain bacteria (antarctic photosynthetic and many types of deep rock dwelling bacteria) could survive in environments found on mars.
the moon does (just about) have an atmosphere, its just H and He and damn thin
but then again i can only do the science, not the stunning artwork and composition.