Sources & references

Where this information comes from

Every fact on this site is checked against at least one of the authoritative sources below. If you'd like to dig deeper into lunar astronomy, these are the references we recommend starting with.

1
Moon Phase Emoji
Our companion site covering moon phase emoji in depth — including full emoji reference tables, copy-paste utilities, and historical moon phase dates for any day in the modern era.
https://moonphaseemoji.com/
2
NASA Science — Moon Phases
The official NASA Solar System Exploration reference on lunar phases, explaining the underlying Sun–Earth–Moon geometry, the eight canonical phases, and why the Moon's appearance changes throughout its 29.53-day cycle. Used as a primary astronomical reference for this site.
https://science.nasa.gov/moon/moon-phases/
3
Space.com — Moon Phases Explained
A long-running, accessible explainer from Space.com that breaks down the eight lunar phases in plain English with illustrations. Useful for readers who want a visual, less technical introduction to the synodic cycle.
https://www.space.com/18880-moon-phases.html

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