Dictionaries, encyclopedias, handbooks, and directories are great sources for finding information. Take a look at examples of what kind of dictionaries, encyclopedias and multimedia that York University has in their subject research guides on astronomy:
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Here is an example of a dictionary and a encyclopedia about astronomy:
Description: This dictionary is the top reference tool available containing almost 4,000 entries covering all commonly encountered terms and concepts from physics and the related fields of astronomy, astrophysics, and physical chemistry. It is an ideal introduction to the subject for anyone with an interest in physics, as well an indispensable reference work for students and professionals (Law, J. & Rennie, R., 2015).
Ludwig. (2017, October 30). “Comprehensive guide to physics jargon, love it!” [Review of the book A Dictionary of Physics, by J. Law & R. Rennie]. Goodreads. Retrieved from
https://www.goodreads.com/book/show/23462789-a-dictionary-of-physics?from_search=true#other_reviews
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Description: This encyclopedia is aimed at researchers and enthusiasts covering the discipline, including the latest and most important advances. There are more than 3,000 alphabetically organized articles accompanied by 500 photographs, star maps, and diagrams. These articles were written and reviewed by more than 100 astronomers from leading universities and observatories, each an expert in a specialized area of the field (Moore, P. & Robinson, L. J., 2002).
Terence. (2008, August 16). “Another reference book that I love to just browse through without any particular goal in mind. It has articles on stars, galaxies, astronomers, observatories, planets, space missions and pretty much everything else that makes up the night sky (which is, unfortunately, not easily visible here in the middle of Los Angeles).” [Review of the book The Astronomy Encyclopedia, by P. Moore & L. J. Robinson]. Goodreads. Retrieved fromhttps://www.goodreads.com/book/show/443321.The_Astronomy_Encyclopedia#other_reviews
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References
Astronomy: Dictionaries, Encyclopedias & Multimedia. (n.d.). York University. Retrieved from http://researchguides.library.yorku.ca/c.php?g=679386&p=4792195
Law, J. & Rennie, R. (2015, July 14). A Dictionary of Physics, Goodreads. Retrieved from https://www.goodreads.com/book/show/23462789-a-dictionary-of-physics
Law, J. & Rennie, R. (2015). A Dictionary of Physics, [JPG file]. Retrieved fromhttps://www.goodreads.com/book/show/23462789-a-dictionary-of-physics
Moore, P. & Robinson, L. J. (2002, November 21). The Astronomy Encyclopedia, Goodreads. Retrieved from
https://www.goodreads.com/book/show/443321.The_Astronomy_Encyclopedia
Moore, P. & Robinson, L. J. (2002). The Astronomy Encyclopedia, [JPG file]. Retrieved from https://www.goodreads.com/book/show/443321.The_Astronomy_Encyclopedia
Wikimedia Commons. (n.d.). Logo York University, [PNG file]. Retrieved from
https://commons.wikimedia.org/wiki/File:Logo_York_University.svg
Astronomy Earth Sciences 
