Web Directory

» Astronomy Dictionary
   Combined look-up of several dictionaries with simple and clear definitions of technical terms.
   http://dictionary.babylon.com/science/astronomy

» Eric Weisstein's World of Astronomy
   Most comprehensive resource; includes among others the fields of Galactic Astronomy, Observational Astronomy, Solar System, Stars, and Remote Sensing.
   http://scienceworld.wolfram.com/astronomy/

» Imagine the Universe! Dictionary
   NASA Dictionary intended for students age 14 and up.
   http://imagine.gsfc.nasa.gov/docs/dictionary.html

» Nomenclature of Celestial Objects
   Dictionary with full references on the designations of astronomical objects and their acronyms.
   http://vizier.u-strasbg.fr/cgi-bin/Dic

» PSRD Glossary
   Glossary for Planetary Science Research Discoveries covers terms related to the latest research on meteorites, planets, and other solar system bodies.
   http://www.psrd.hawaii.edu/PSRDglossary.html