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Moon & Earth

Phases, orbits and tides

Question 1 of 60 correct so far

What causes the Moon to show phases?

ANDROMEDA

A study companion for the night sky. Figures follow NASA and IAU reference data; simplified for learners, never invented.

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ANDROMEDA · A Handbook for the Astronomically CuriousProgress is stored on this device only

Created & envisioned by Leslie Anne Forrester

Established November 11, 2026