For your convinience, we mirror three interesting hypertexts:

• Welcome to the planets prepared at NASA's Planetary Data System, Jet Propulsion Laboratory, Pasadena.
• The Nine Planets from the Students for Education and Development of Space, Lunar and Planetary Laboratory, Tucson.
• The Web Nebulae by Bill Arnett.

• Astronomy and Astrophysics (new site!)
• Astronomical Journal
• Astrophysical Journal
• Astrophysical Journal Letters
• Publications of the Astronomical Society of the Pacific
• Celestial Mechanics and Dynamical Astronomy
• Planetary and Space Science
• Icarus (Icarus papers on-line, local users only)
• Bulletin of the American Astronomical Society
• Meteoritics and Planetary Science
• The ESO Messenger
• Sky and Telescope
• Astronomy
• Nature
• Science

Encyclopaedias

• Encyclopaedia Britannica
• Encyclopaedia of Astronomy and Astrophys (access limited to Poznan Observatory computers only)
• Columbia Encyclopaedia
  (also from this page: dictionaries, thesauri, quotations, English usage and more)
• Wielka Internetowa Encyklopedia Multimedialna (in polish)
• Internetowa Encyklopedia PWN (in polish)

Electronic news bulletins

• Sky and Telescope Weekly News
• Virtual Universe News Astronomical news, articles and more (all in Polish)
• PSRD: Planetary Science Research Discoveries. Provides news from planetary astronomy

Lecture notes and such...

• Astronomy notes by Nick Strobel from Bakersfield College. This is a superb multimedia book on general astronomy.
• The Solar System by Mike Guidry from University of Tennessee, USA.
• The Solar System by Lucia M. Franco from University of Chicago, USA
• The Solar System
• A collection of graphs and photos
• Stars, Galaxies, and Cosmology by Mike Guidry from University of Tennessee, USA.
• Astronomy lecture notes by Scott R. Anderson, Emory University in Atlanta, USA

Instructor and student resources for popular textbooks

• Explorations: an Introduction to Astronomy by Thomas T. Arny

  Lots of materials, ranging from graphs and images, taken from the book, through animations, quizzes, glossary to practical tutorials.

• Universe by W.J. Kaufmann and R.A. Freedman

  Observing and interactive excercises, current events in astronomy, animations and video, lots of web links...

• AN INTRODUCTION TO MODERN ASTROPHYSICS by B.W. Carroll and D.A. Ostlie.

  Source code of computer programs, a set of nice PostScript figures and more...

Useful computer journals and documentation:

• Unix World On-line (provides practical, tutorial-oriented articles for beginner to expert users)
• Indiana University Knowledge Base
  A searchable database of over 7,000 answers to questions about computing
• Evaluating and Citing Web Sites
  Information on citation of web sites in scholarly publications.
• How to design web pages (local copy)
• GNU/Linux zone
• TeX and LaTeX zone