Open universes from bubbles: an introduction and update

Abstract

An introduction to models of open universes originating from bubbles, including a summary of recent theoretical results for the power spectrum. To appear in the proceedings of the XXXIth Moriond meeting, "Microwave Background Anisotropies."

Comments: LaTeX file, uses epsf.tex, 3 figures, 8 pages, minor wording changes to clarify discussion of coordinate systems