(There will be a Blue Moon tonight)…The moon will not actually be Blue.
That is what they call it. It is really an extra Full Moon. Astronomers say there are normally 12 full moons, one a month every year. Every once in a while, such as this year 2015, there are 13 full moons in the year. The extra full moon, or the second one in a month, is called a Blue Moon. The first Full moon this month was on July 2nd.