Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!linus!wivax!decvax!harpo!floyd!vax135!ukc!edcaad!edee!glasgow!sysman From: sysman@glasgow.UUCP Newsgroups: net.physics Subject: Re: An interisting bit of trivia heard on "Cosmos" Message-ID: <210@glasgow.UUCP> Date: Wed, 15-Jun-83 13:40:44 EDT Article-I.D.: glasgow.210 Posted: Wed Jun 15 13:40:44 1983 Date-Received: Mon, 20-Jun-83 01:36:39 EDT References: sri-arpa.1906 Lines: 9 Interisting (sic) indeed, however we are told that there are only about 10^80 electrons in the universe and this is somewhat smaller than 10^1200 tons of fuel necessary to circumnavigate the Universe. It would seem that a much more efficient fuel is necessary. Has anybody calculated the amount of matter that would have to be gathered from space for a ship of reasonable size to keep accelerating at 1g? Zdravko Podolski, Glasgow, Scotland