home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: alt.sci.planetary
- Path: sparky!uunet!boulder!ucsu!spot.Colorado.EDU!knapp
- From: knapp@spot.Colorado.EDU (David Knapp)
- Subject: Re: Sailing and Faster-Than-Light Travel
- Message-ID: <1992Nov17.153511.11824@ucsu.Colorado.EDU>
- Sender: news@ucsu.Colorado.EDU (USENET News System)
- Nntp-Posting-Host: spot.colorado.edu
- Organization: University of Colorado, Boulder
- References: <1992Nov17.023854.5180@bnr.ca>
- Date: Tue, 17 Nov 1992 15:35:11 GMT
- Lines: 49
-
- In article <1992Nov17.023854.5180@bnr.ca> davev@bnr.ca writes:
- >I've read that it would be possible to send a "probe" to the
- >nearest star at near relativistic speeds by making use of a large
- >solar sail and a small lightweight probe. This sounds cheap,
- >but extremely difficult.
-
- I would say 'expensive' and extremely difficult, since the technology would
- have to literally be developed from the ground up. NASA has a history of
- ignoring common modern technology in favor of tried and true (and previously
- implemented) technology. Tape drives on space probes and core memory in
- the space shuttle are two examples.
-
-
- >However, one watches Star Wars and Star Trek, etc, and dreams
- >of faster than light travel and sending probes and people to the
- >far reaches of space.
- >
- >a) What are people's opinions on unmanned planetary exploration
- > through the use of solar sails, and
-
- Since we have technology and proven capability to send probes to planets
- on reasonable time scales *already*, I think that the idea of developing
- a whole new technology for thrust energy will be frowned on.
-
- >b) Why is or why is not faster than light travel possible?
-
-
- Depends on if what you want to accelerate beyond 'c' has mass or not. If it
- has any mass, the mass of the object approaches infinity as you approach
- the speed of light. ONe thing many people ignore is that you can work to
- go *much* faster than we are currently capable of going.
-
- > know that as an object approaches the speed of light it's
- > mass approaches infinity, and that besides needing infinite
- > propellent, you need to eject it just as fast, using conventional
- > means. I'd be interested in the non-conventional.
-
-
- Oops, there you go. This kind of discussion happens *all the time* in
- sci.'physics' In general,correct me if I'm wrong, Planetary Scientists,
- but the reason that Planetary Scientists are able to get so much done as they
- do is because they aren't spending their time on conjecture as much as reality.
-
-
-
-
- --
- David Knapp University of Colorado, Boulder
- Perpetual Student knapp@spot.colorado.edu
-