Is it possible that astronauts can travel on planet mercury or planet mars?
Mars has temperatures ranging from about 10F (noontime equator) down to -150F (polar winters), and its thin atmosphere has no oxygen. This means spacesuits with good heating elements. However, humans can land and survive on Mars with current technology. Journeys there will take at least seven months with current technology. Travel on the surface can be done with dune buggy type vehicles (as was done on three Apollo missions on the Moon), or using proposals for blimp-like fliers. Mercury also has no oxygen, and an atmosphere of argon and helium so thin as to be meaningless. Temperatures have the greatest range of the entire Solar System, from 600F (equatorial noon) down to -200F (nightime). The polar regions would have the most acceptable temperatures, and spacesuits could handle it. Again, surface travel could be with something akin to dune buggies. Travel to Mercury takes at least six months with current technology.
