Thirty-eight years ago (1969), when Apollo 11 landed on the Moon and returned safely to Earth, I would have said, "In 20 years or so!" In mid-1972 I might have said that in view of the cancellation of Apollo 18, 19 and 20, it would take another 30 years to get to Mars. <br /><br />With our national lack of will, resulting in Congress being unwilling to support much more than a replacement for the Shuttle to support International Space Station (ISS) operations, with a POSSIBLE return to the Moon by 2025, I'd hesitate to predict UNLESS we either become more enthusiastic about human space exploration OR someone else (China and/or India) scare the dawg out of us, and get us back on track!<br /><br />There are a LOT more problems associated with going to Mars, especially regarding human physiology in zero-g and cosmic radiation, than was once believed. Some of the data we need to insure the health and safety of Mars astronauts will HAVE TO BE obtained on the Moon. Thus, we have to establish permanent human-tended outposts ON the Moon to obtain the data.<br /><br />While it is true that most astronauts (pilots) HAVE BEEN military, there are quite a number who have been mission or payload specialists, having advanced degrees, but not necessarily military pilots. In the future, I would see opportunities for specialists on the commercial side, once the fledgling commercial space efforts get going. Eventually, these efforts MUST come up behind the NASA-run EXPLORATION programs or space exploration will not be sustainable! History has shown this about Earthly exploration.<br /><br />Since you say you have just turned 18, what are you doing about college? If you want to have a CHANCE of going to Mars or even the Moon, you are going to have to have an education in some field that will be needed. This can cover specialties from engineering to medicine, geology, physics, biology, and a host of other things. Even support personnel who stay on Earth will have to have a lot of diff