Question: Why does the moon appear in the daytime?

Martin Johnsson answered on 16 Mar 2020:

Let’s see if I can give a somewhat helpful answer to this, despite not being an astronomer at all. 🙂

We see the moon because light from the sun is reflected on it.

Where the moon is in the sky and what it looks like depends on the positions of the earth, moon and sun. Our planet goes around the sun, while the moon goes around our planet. At the same time, our planet is spinning.

All of that adds up to the moon looking like it wanders across the sky, and looking like a big disk when sunlight falls on all of it, or like a small crescent when most of the light from the sun is blocked by our planet.

When the moon is in the right position to be seen, and the light reflected from it is bright enough compared to the rest of the sky, we can see it during the day too.