Blue Moon 2009: Rare Blue Moon on New Year's Eve
There will be a rare blue moon occurrence during New Year's Eve 2009. It's the first time we have had a blue moon on New Year's Eve since 1990, and the next one won't occur until 2028. Aside from fireworks, the Blue Moon is something else to gaze up at on the stroke of midnight.
For the first time since 1990, revellers will be able to ring in the New Year under the light of a Blue Moon. The next blue moon to occur on New Year’s Eve will not happen until 2028.
What exactly is a blue moon? Does the moon really turn blue? No, the moon does not turn blue. A blue moon is a name given to the second full moon of the month. This rarely happens because full moons come once every 29 days. For a blue moon to occur, the first full moon must come on the first or second day of the month. February is the only month that cannot have a blue moon because it only has 28 or 29 days, depending on whether it's a leap year. The phrase "once in a blue moon" refers to the fact that blue moons are such a rare events.
Does the moon ever appear blue on Earth? Sometimes, if airborne pollution interferes with our atmosphere. In 1883, the volcanic eruption at Krakatoa caused the moon to appear blue around the world for two years. Similar reports of people seeing blue moons occurred after eruptions at Mt. St. Helens in 1980 and Mount Pinatubo in 1991.