Astronomy
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- Narrower7
- Focus of11
- Astronomy -- Italy -- History -- 17th century
- Astronomy
- Astronomy -- Encyclopedias
- Astronomy -- Encyclopedias, Juvenile
- Astronomy -- Observers' manuals
- Astronomy -- Miscellanea
- Astronomy -- Charts, diagrams, etc
- Astronomy -- Fiction
- Astronomy -- Amateurs' manuals
- Astronomy -- Italy -- History -- 16th century
- Astronomy -- Observations
- Sub focus of10
- Astronomy + History
- Astronomy + Study and teaching + Activity programs
- Astronomy + Study and teaching (Secondary) + Activity programs
- Astronomy + Study and teaching (Middle school) + Activity programs
- Astronomy + Observers' manuals
- Astronomy + Experiments
- Astronomy + History -- Pictorial works
- Astronomy + History -- 20th century
- Astronomy + History -- 19th century
- Astronomy + Philosophy