Word origin · etymology
Editorial English navigation title.
Sky names the visible heavens, bodies the objects within them, and coordinates the quantities locating them. The heading brings physical objects and reference geometry together.
How we know · epistemology
Editorial subject classification
“Sky, bodies & coordinates” is a browsing category chosen for this atlas. Its child entries share a topic or practical connection. This grouping is not evidence that all of them descend from one historical lineage; transmission claims require separate sources.
Connected concepts
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These links connect subjects and terminology. They do not establish a shared historical origin.
Sources & provenance
Use the citations beside each section to distinguish a calculation convention, a historical teaching and an editorial example.