Subject Search:  Astrophysics--Observations.

	Subject
	Astronomy--Dictionaries.
	Astronomy--Early works to 1800.
3	Astronomy--Encyclopedias.
	Astronomy--Encyclopedias, Juvenile.
	Astronomy Ephemerides See: Nautical almanacs
	Astronomy--Experiments.
2	Astronomy--Handbooks, manuals, etc.
3	Astronomy--History.
	Astronomy, Micronesian.
	Astronomy--Miscellanea.
4	Astronomy--Observers' manuals.
	Astronomy--Periodicals.
	Astronomy--Pictorial works.
3	Astronomy, Polynesian.
8	Astronomy--Popular works.
2	Astronomy--Popular works--CD-ROMs.
	Astronomy--Popular works--Periodicals.
	Astronomy, Prehistoric--Peru.
	Astronomy--Problems, exercises, etc.
	Astronomy--Societies--Fiction.
	Astronomy--Study and teaching--Activity programs.
4	Astronomy--Textbooks.
	Astronomy--Yap--Periodicals.
	Astrophysics--Historiography.
	Astrophysics--History.

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