by lpetrich » Sun 22 Feb 2015, 00:20:49
$this->bbcode_second_pass_quote('pstarr', 'S')o ipswitch, I take it that is a "big no-go there buddy on the space travel thingy?"
Yes indeed. A BIG no-go. Work out the numbers. Look at what's been done so far.
As to the economics of space travel, I remember someone several years ago stating that the cheapest thing to return from outer space is information. It is rather paradoxical, but as far as I can tell, it's true. It's also consistent with the most successful uses of space travel so far:
- Communications relaying
- Navigation: GPS and the like
- Observation, like weather satellites, spy satellites, and space telescopes
Likewise, nearly all Solar-System exploration missions have been one-way. The spacecraft radio back what they find as they travel.
Sample return mission - Wikipedia lists all the missions that have returned physical objects from elsewhere in the Solar System. The biggest returns have been rocks from the Moon, both by Apollo astronauts and by Soviet sample-return spacecraft. The rest is asteroid dust, comet dust, and solar wind.