May. 31st, 2007

wowie: reading (time_sundial)
Tonight is a special night for astronomy buffs. That’s because there will be a blue moon tonight. We’ve all heard the expression “once in a blue moon.” We use this expression when talking about something that rarely happens. Over the years, there have been many meanings to the term “blue moon.” But the modern definition of blue moon is the second full moon in a month. Blue moons occur more frequently than one might think. In fact, they occur about every 2½ years. You can learn more at NASA’s site. I doubt that the moon will actually turn blue tonight. It will probably be slightly gray, as usual. But you never know!

science.nasa.gov

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