"The Return of the Space Visionaries" Topic
9 Posts
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| Tango01 | 08 Oct 2020 9:49 p.m. PST |
"n 1969, the year that astronauts first walked on the Moon, Princeton physics professor Gerard K. O'Neill, "almost as a joke," posed a theoretical exercise for his students: Is Planet Earth the best location for a growing techno-industrial civilization? Working through calculations with them, he came to conclude that Earth is indeed not the best location — that other planets, and space itself, would be a better venue for an expanding technological species, offering more energy and raw materials, and risking less pollution of our home planet. "As sometimes happens in the hard sciences," he later explained in an article in Physics Today, "what began as a joke had to be taken more seriously when the numbers began to come out right." O'Neill expanded the ideas into the now-classic 1977 book The High Frontier. It imagined large spinning habitats built from lunar materials and housing thousands of people. It would be paid for by selling power, using huge arrays, also from lunar materials, to collect sunlight and beam it down to Earth in the form of microwaves. Most industrial activity would be moved off of the home planet, which would become a giant nature park for both inhabitants and tourists visiting from space…"
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| Thresher01 | 09 Oct 2020 12:04 a.m. PST |
Sounds like a good idea to me, but may already be too late. Of course, getting stuff to and from space is a major challenge too, and getting stuff offworld is a big carbon-dioxide emissions nightmare. |
Frederick  | 09 Oct 2020 6:11 a.m. PST |
Beltalowda! Think of all you can do in the asteroid belt |
| Shagnasty | 09 Oct 2020 10:50 a.m. PST |
Read the early "Expanse" books to see how that might work out. |
| SBminisguy | 09 Oct 2020 10:52 a.m. PST |
Of course, getting stuff to and from space is a major challenge too, and getting stuff offworld is a big carbon-dioxide emissions nightmare. 1. Easy to get stuff back -- use 3D zero-G printing using sintered materials from asteroid mining to create an ablative shell, with a parachute rig that can be deployed, and drop it down the gravity well. 2. What CO2 "nightmare"? LOx-H rockets produce water vapor. |
 Legion 4  | 11 Oct 2020 3:46 p.m. PST |
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| Tango01 | 11 Oct 2020 9:10 p.m. PST |
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| von Schwartz | 12 Oct 2020 5:44 p.m. PST |
CO2 nightmare?!?! Isn't CO2 essential for green living to grow? So, how can it be so "toxic". Lets not forget either, now since everyone is supposed to wear masks. When you wear a mask you are rebreathing the CO2 you just exhaled! Is THAT healthy? |
| Thresher01 | 13 Oct 2020 3:32 p.m. PST |
Sarcasm doesn't work on the internet. |
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worries about not losing his rules stuff.
