Encyclopedia > Wikipedia:Dewey Decimal System 52

Article Content

Wikipedia:Dewey Decimal System/52

Dewey Decimal System > 5 Natural Sciences and Mathematics > 52 Astronomy and Allied Sciences

520 Astronomy and Allied Sciences

521 Celestial mechanics

522 Techniques, equipment, materials[?]

523 Specific celestial bodies and phenomena[?]

524 Not Used

525 Earth[?] (Astronomical geography)

526 Mathematical geography[?]

527 Celestial navigation[?]

528 Ephemerides[?]

529 Chronology[?]

All Wikipedia text is available under the terms of the GNU Free Documentation License

Search Encyclopedia

Search over one million articles, find something about almost anything!

Featured Article

Sakhalin

... that the connexion between the Pacific and Arctic Oceans was broader than it is now. Only two rivers are worthy of mention. The Tym, 250 m. long and navigable by rafts and ...