What causes the phases of the Moon?

Changing angles of sunlight as it orbits Earth.

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  1. The Moon changing shape
  2. Changing angles of sunlight as it orbits Earth ✔
  3. Clouds covering the Moon

Why: As the Moon orbits Earth, we see different amounts of its sunlit side, creating the phases we observe.

Huh, didn't know that: As the Moon orbits Earth, we see different amounts of its sunlit side, creating the phases we observe.

The dad joke
The Moon is just going through a phase!
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References

Answer: Changing angles of sunlight as it orbits Earth. As the Moon orbits Earth, we see different amounts of its sunlit side, creating the phases we observe.

  1. Scouting America: Astronomy www.scouting.org/merit-badges/astronomy
    Sketch the phase and position of the Moon, at the same hour and place, for four nights
    Checked 2026-11-07.

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