Abstract

Alternate View Column AV-19 Keywords: cosmic strings, gravitational lensing, angle deficit, superconductor, space drive Published in the April-1987 issue of Analog Science Fiction & Fact Magazine; This column was written and submitted 9/19/86 and is copyrighted © 1986, John G. Cramer. All rights reserved. No part may be reproduced in any form without the explicit permission of the author