Have you ever heard the saying, "Once in a blue moon"? The saying started because blue moons are very rare and it was an inventive way to express time! Every year there are 12 full moons...one full moon a month. This month is different--there will be two full moons! The second full moon is known as a blue moon and tonight will be its debut! The next time there will be a blue moon will be 2028, so make sure you get out there tonight and enjoy it! A blue moon sounds like the perfect way to end 2009!