Question

Why does the moon appear to be yellow and blue at times?

Answer 1

At times the moon might look red, orange or even blue. The moon appears to be certain colours during certain times of the year. For instance, the harvest moon during the fall appears very large and orange. There are two reasons for this, the moon's path across the sky, and the climate of the earth. During certain times of the year, the moon will rise and set at different angles. Sometimes the moon stays really low in the sky and never reaches an overhead position. The earth's atmosphere also goes through certain changes at certain times of the year.
In some months, the atmosphere has more dust particles than usual; in other months, the atmosphere contains a lot more cloud particles than usual. Extra particles in the atmosphere mean more scattering of light. In the fall, many farmers are harvesting their crops. Lots of dust from the soil of the crops get disturbed. The dust floats into the atmosphere. At the same time, the moon is lower in the sky during the fall season.