Why does the Moon change shape during the month?
Moon's Shape Trick
Why does the Moon change shape during the month?
Some nights the Moon is a fat round coin. Some nights it's a thin silver eyelash. A week later it has vanished completely, like it skipped town. So here's the mystery: why does the Moon keep changing its shape? Spoiler — it never does. The Moon is always a full ball. What changes is how much of it we can SEE lit up.
First, an important secret: the Moon makes no light of its own. None. It's just a giant rocky ball, dim and grey, hanging in space. Everything bright about it is borrowed. The Moon is a mirror, and the thing it's reflecting is the Sun.
