in my humble believes this question depends on: do we have enough resources to build something massive like the star trek space ship enterprise

Helium-3 on the moon, necessary fuel for nuclear fusion…….

Helium-3 is considered a safe, environmentally friendly fuel candidate for these generators, and while it is scarce on Earth it is plentiful on the moon… As a result, scientists have begun to consider the practicality of mining lunar Helium-3 as a replacement for fossil fuels.

(http://www.wired.com/science/space/news/2006/12/72276)

So the moon could provide the fuel for space exploration……. and powering the energy needs on earth alike.

But where does the massive amount of titanium and other rare minerals like hematite should come from?

Remember that mars looks „rusty“ and was referred by ancient folks as „the god of war“?

Hematite, also spelled as hæmatite, is the mineral form of iron(III) oxide (Fe2O3), one of several iron oxides. Hematite crystallizes in the rhombohedral system, and it has the same crystal structure as ilmenite and corundum. Hematite and ilmenite form a complete solid solution at temperatures above 950°C.

… now guess what they found on mars with their rovers? (c’mon… a trace of life would have been exciting on mars….. but a trace of gold not?;)

massive amounts of hematite „perfect little spheres“ right on the surface of mars 

http://www.space.com/common/media/show/player.php?show_id=28

this is what the real „segourny weaver“ looks like: 

and i know who is going to mars …. those guys: 
or maybe those guys: 
… cause we ran out of money.
well in the end…… does matter matter?
‘A good candidate is isotope helium-3 to be used for nuclear power. It is available on the Moon.

‘The earth’s reserves of helium-3 are so negligible that their industrial use is absolutely out of the question. According to some estimates, our natural satellite contains no less than 1 million tons of helium-3, which can fully meet the entire Earth’s power demand for a period of more than 1000 years.’

Looking ahead, Russia also holds ambitions of a manned mission to Mars – with the parallel wish to set up a base for extended stays and exploitation of the Red Planet. While the Moon missions require Russian government funding, Sevastiyanov knows the Mars plans require an international effort.

An expected alliance with an economically revitalised China could be the key for Russia – an alliance that is not only important to national goals, but for the planet as a whole.

Next Question: Will traveling space be a ridiculous pyjama-party?😉

http://www.aleph.se/Trans/Tech/Space/mars.html

http://www.nss.org/settlement/mars/zubrin-colonize.html