This means that it is probable at some time to have 2 moons in a calendar month. It happens about once every 2.5 years. A seasonal blue moon is actually much more rare. This describes a situation where there are 4 full moons in a single season. By season, we are referring to the astronomical seasons and not the calendar seasons. Still, there are 3 months in an astronomical season. If there are 4 full moons during that season, we call the 3rd moon the blue moon. What is even more rare is the phenomenon of a seasonal blue moon and a blue moon in the same calendar year. This would mean 13 full moons per calendar year with one of them being a seasonal blue moon. The next time this is likely to happen is in the year 2048, when it will see a monthly blue moon on January 31 and a seasonal blue moon on August 23. Even weirder is the year 2067, when you will have a seasonal blue moon, a blue moon, and virtually no full moon in the month of February. The term harvest Moon refers often to them only see during the autumn months when it is quite full and bright as it rises. It actually means very little right now but was important before we had electricity because farmers needed this bright light to continue their harvest.
WHAT IS GREEN FLASH? A Green flash is something you should try to look for some time. You only see it under favorable conditions at sunrise or at sunset. It depends on being able to see a mirage at that time and on the fact that sunlight disperses in specific ways when the sun is rising or setting. The Green flash is seen only a few seconds. The mirage you see is not the same thing as a mirage you see on a hot roadway. Instead, it is an astronomical mirage, at least some of the time. There are actually 4 different mirages you can see. •
An inferior mirage can be seen with the naked eye as the sun is dipping below the horizon. The mirage you see is identical to that you might see on the roadway.
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A mock mirage is essentially caused by a thermal inversion in the atmosphere. It will look very similar to an inferior mirage.
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