\documentstyle{preprint} \begin{document} \title{SPACE INTERFEROMETRY MISSION:\\ ~\\ TAKING THE MEASURE OF THE UNIVERSE} \author{R.~J.\ Allen\\ \\ Space Telescope Science Institute\\ \\ 3700 San Martin Drive\\ \\ Baltimore, MD 21218\\ \and D.\ Peterson\\ \\ State University of New York, Stony Brook\\ \and M.\ Shao\\ \\ Jet Propulsion Laboratory, Pasadena} \pub{{\em the proceeding of the symposium}\\ ~\\ Optical Telescopes of Today and Tomorrow,\\ ~\\ {\em held in Landskrona, Sweden}\\ ~\\ {\em May 29--June 2, 1996}\\ ~\\ {\em Proceedings to be published by SPIE}} \maketitle \abstract{ In 1991 the Astrophysics Division of NASA's Office of Space Science convened the Space Interferometry Science Working Group to consider in more detail the science goals of a space interferometer mission to do wide-angle astrometry at optical wavelengths. In addition, the working group considered the merits of alternative mission concepts for achieving those goals. We describe the current state of the adopted mission concept, and review the candidate astrometric science program. In addition to the main goal of precision astrometry, the concept interferometer has a limited capability for high- resolution imaging using rotational aperture synthesis. A Phase A start on this mission has been made in 1996, and launch is planned for 2003.} \end{document}