Word origin · etymology
Editorial English interface metaphor.
Objects names the selected celestial bodies; layers borrows the idea of stacked sheets to describe optional information added to a sky view.
How we know · epistemology
Editorial subject classification
“Objects & sky layers” 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
Browse other concepts in Wiki branches →
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.