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The history of the tropical year

When we look at different books on fundamental astronomy, we are surprised to find that the definition of the tropical year varies from one author to the other. The definition changed in the course of the centuries, and presently it has nothing to do with the beginning of astronomical spring.



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The history of the tropical year

https://adsabs.harvard.edu/abs/1992JBAA..102...40M

When we look at different books on fundamental astronomy, we are surprised to find that the definition of the tropical year varies from one author to the other. The definition changed in the course of the centuries, and presently it has nothing to do with the beginning of astronomical spring.



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https://adsabs.harvard.edu/abs/1992JBAA..102...40M

The history of the tropical year

When we look at different books on fundamental astronomy, we are surprised to find that the definition of the tropical year varies from one author to the other. The definition changed in the course of the centuries, and presently it has nothing to do with the beginning of astronomical spring.

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      When we look at different books on fundamental astronomy, we are surprised to find that the definition of the tropical year varies from one author to the other. The definition changed in the course of the centuries, and presently it has nothing to do with the beginning of astronomical spring.
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