The Library of Congress classification for astronomy is QB. More specifically, QB is broken down as follows:
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QB1-991 Astronomy
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QB1-139 General
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QB140-237 Practical and spherical astronomy
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QB275-343 Geodesy
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QB349-421 Theoretical astronomy and celestial mechanics
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QB455-456 Astrogeology
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QB460-466 Astrophysics
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QB468-480 Non-optical methods of astronomy
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QB495-903 Descriptive astronomy
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QB500.5-785 Solar system
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QB799-903 Stars
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QB980-991 Cosmogony. Cosmology
Browsing in any of these areas may lead to the discovery of valuable material in addition to the specific items listed in this guide.
