The Space Telescope Science Institute Symposium on Planets to Cosmology: Essential Science in the Final Years of the Hubble Space Telescope took place during 3–6 May 2004.
These proceedings represent only a part of the invited talks that were presented at the symposium. We thank the contributing authors for preparing their manuscripts.
With some uncertainty concerning Hubble's next Servicing Mission still hanging, identifying the most crucial science to be performed by this superb telescope has become of paramount importance. With this goal in mind, the symposium examined a wide range of topics at the forefront of astronomy and astrophysics. The result is a magnificent collection of results, with a special emphasis on future research.
We thank Sharon Toolan of ST ScI for her help in preparing this volume for publication.