Question

In the image (not to scale), which phase of the moon would you observe from the earth?


A crescent
B full
C half
D new
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Answer 1

I don’t see the image — could you upload it or describe the positions of the Sun, Earth and Moon in the diagram?

Meanwhile, here’s how to tell the correct answer from the usual Sun–Earth–Moon diagram:

- If the Moon is roughly between the Earth and the Sun (on the Sun side), we see the dark side from Earth → new moon (D).
- If the Moon is on the opposite side of Earth from the Sun, we see the fully lit face → full moon (B).
- If the Moon is at a 90° angle from the Sun–Earth line (to the side), we see half of the Moon lit → half moon/first or third quarter (C).
- If the Moon is near the Sun side but slightly off to one side, we see a thin lit sliver → crescent (A).

Upload the diagram or tell me where the Moon sits relative to the Sun and Earth and I’ll pick the letter.