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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