No; some are thirty-one days long, some thirty days long, and one only twenty-eight days long.

When can we see the moon and stars best?

We can see them best when it is night.

From what do the moon and the other planets get their light?

They get their light from the sun.

What do they do with this light?

They reflect it.

How do we see them?

We see them by the light which they reflect.

Why cannot we see the moon and stars in the day-time?