Document (#42456)

Author

Dick, S.J.

Title

Astronomy's Three Kingdom System : a comprehensive classification system of celestial objects

Source

Knowledge organization. 46(2019) no.6, S.460-466

Year

2019

Series

Reviews of concepts in knowledge organization

Abstract

Although classification has been an important aspect of astronomy since stellar spectroscopy in the late nineteenth century, to date no comprehensive classification system has existed for all classes of objects in the universe. Here we present such a system, and lay out its foundational definitions and principles. The system consists of the "Three Kingdoms" of planets, stars and galaxies, eighteen families, and eighty-two classes of objects. Gravitation is the defining organizing principle for the families and classes, and the physical nature of the objects is the defining characteristic of the classes. The system should prove useful for both scientific and pedagogical purposes.

Content

DOI:10.57 71/0943-7444-2019-6-460.

Field

Astronomie

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