From: "Andy Robertson"
Subject: Re: (urth) Thoughts on Undines, and other ramblings Date: Mon, 17 Jun 2002 05:32:34 +0100 ----- Original Message ----- From: "Alice K. Turner" > One final ramble: By the end of our series, Severian is but > one AU from the source of his power, and is probably going > to have a hard time dying, even of old age. He may grow really, really bored. >What is an AU? An Astronmical Unit. The average distance between the Urthand the Sun. 93,000,000 miles and some odd. It is very easy to determine the size of the solar system in terms of this unit, with a simple telescope/sextant, but it was actually not so easy to determine exactly what this unit was until echo-radar ranging of the planets was available . hartshorn --