Originally posted by: tcsenter
i hope not, because i think nasa has done great things for humanity in general and i'm usually for trying to do as much as possible, but i can admit that it's possible that we could have 20 years of research and advancement to do here first before we can go up into space properly. whatever the case, i'd like to see real dialogue before people say knee-jerk that nasa is useless or vital.
The real issue is this:
Space flight is not inherently valuable, no more than terrestrial flight is inherently valuable. The value of any flight is to get you somewhere, there must be some kind of desired destination. Just flying for the sake of flying may be fun and thrilling, but its also extremely expensive. When the money is coming out of the public treasury, for the purpose of public benefit, we should hope the expenditure of public resources promises to deliver something which accomplishes a little more than giving some astronauts a fun and thrilling ride.
The NEAREST thing of any compelling interest is Alpha Centauri, which is only the 'stone's throw' distance of 4.35 light years from earth. That's 25.5 trillion miles, give or take. At an ambitious and currently unattainable speed of 100,000 miles per hour, it would take a tad more than 29,000 years (twenty nine thousand) to reach Alpha Centauri, presuming there is anything of interest there.
But let's be REEEL ambitious and suppose we can find propulsion to deliver 300,000 miles per hour. Well, that's makes all the difference, because our E.T.A. to Alpha Centauri has dramatically decreased to a miniscule 9700 years (nine thousand seven hundred). But hey, let's be even more ambitious, at one million miles per hour, we could 'hop on over' to Alpha Centauri in just under 3,000 years (three thousand).
That's presuming there is something there of interest, and it better be damned good, like a perfectly inhabitable planet that isn't spoken for by its current inhabitants, the odds of which even by the most optimistic "science fiction novel" estimates is on the level of one in a few billion.
Even if we could have started our space program 100 years ago with our current body of accumulated technological knowledge, and spending three times what we currently spend, we probably wouldn't be able to make the trip by the turn of the 22nd century.
IOW, the "Trekkies" with their fanciful science fiction dreams want us to divert precious hundreds of billions, even trillions over the next 50 - 100 years, away from other needy causes so that we can pursue what amounts by any rational standard to be a "shot in the dark".
Ooookay!
And if we get to Alpha Centauri and nobody is home?