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- Newsgroups: sci.space
- From: chris@chrism.demon.co.uk (Chris Marriott)
- Path: sparky!uunet!pipex!demon!chrism.demon.co.uk!chris
- Subject: Re: Question:How Long Until Privately Funded Space Colonizati
- Distribution: world
- References: <3954@key.COM>
- Organization: None
- Reply-To: chris@chrism.demon.co.uk
- X-Mailer: Simple NEWS 1.90 (ka9q DIS 1.19)
- Lines: 36
- Date: Tue, 5 Jan 1993 19:13:12 +0000
- Message-ID: <726261192snz@chrism.demon.co.uk>
- Sender: usenet@demon.co.uk
-
- In article <3954@key.COM> rburns@key.COM writes:
-
- >
- >What are the current estimates of folks in this newsgroup of how long it
- >will be until the world starts to see privately funded space colonization?
- >
- >I've noticed that there are some _extremely_ capital intensive schemes around
- >which might make the marginal cost of launching mass to orbit fairly cheap.
- >(I'm thinking of mechanisms like Clarke's space "elevator" or Bull's
- >gun). I'm more interested in technologies like the Henson Sling or SSTO
- >technology that might be more useful to private citizens and less likely to
- >be shelved or monopolized by governments or mega-corps.
- >
- >
- >Thanks!
- >
-
- The "space elevator" - basically dropping a cable from a geosynchronous
- satellite to Earth (and, of course, another one upwards so the centre of
- mass stays still) is probably the most *lethal* device one might conceive
- of building! Imagine the cable breaks near the mid-point. You have 38000km
- of cable falling to earth at *orbital* velocities, enough to wrap itself
- around the entire equator of the planet! Go figure out the kinetic energy
- involved. How much ocean would it vaporize? Massive medium-term climatic
- changes at best - "nuclear winter" scenarios. A new Ice Age a distinct
- possibility.
-
- These things are not good.
- --
- --------------------------------------------------------------------------
- | Chris Marriott | chris@chrism.demon.co.uk |
- | Warrington, UK | BIX: cmarriott |
- | (Still awaiting inspiration | CIX: cmarriott |
- | for a witty .sig .... ) | CompuServe: 100113,1140 |
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