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The DDAS Astronomical Dictionary
The Astronomy Thesaurus
Close shave with asteroid
Glossary
Mission to Mars with Bill Nye
Anglo-Australian Observatory
Glossary of astronomical terms aimed at all levels of learning.
www.geocities.com/kev_woodward/ Science: Astronomy: Amateur: Beginners
Astronomical terms. Searches may be performed in English, French, German, Italian, and Spanish.
www.mso.anu.edu.au/library/thesaurus/ Reference: Thesauri: By Subject
A large asteroid could miss the Earth by only 38,000 kilometres in 2027, according to new astronomical observations. What's more it will remain dangerously close for about 600 years, and chaos theory means that it is impossible to predict its trajectory with enough accuracy for more than a few decades in advance.
news.bbc.co.uk/1/hi/sci/tech/347764.stm Society: Future: Catastrophes: Large Near Earth Object Impacts
Glossary of comet terms.
cfa-www.harvard.edu/icq/ICQGlossary.html Science: Astronomy: Solar System: Small Bodies: Comets
See why Mars is so fascinating to many astronomical scientists. Includes photos of the rover and the planet, as well as a glossary of terms and timeline.
athena.cornell.edu/kids/ Kids and Teens: School Time: Science: Astronomy and Space: Exploration
The AAO operates the Anglo-Australian and UK Schmidt telescopes on behalf of the astronomical communities of Australia and the UK. Has an online catalogue, astronomy preprints, newsletters, links to astronomy journals, and a thesaurus of astronomy terms.
www.aao.gov.au/ Regional: Oceania: Australia: Government: Executive Powers: Education, Science and Training