Blue+Moon+Answers


 * Blue Moon Answers!**


 * The following are answers for question #15 from [|2004 - It's A Leap Year!] web page.**

Is there a "Blue Moon" during this Leap Year (2004)? Answer: Yes (July 31) (//[|Blue Moon Calculator]//)
 * 15. GO LOONEY!

Research and learn information about "Blue Moons". There are 2 contrasting explanations for when a "Blue Moon" occurs! ([|//"Blue Moon"//]) (//[|Sky & Telescope]//) (//Maine Farmers' Almanac: [|Four full moons in a season]//)**
 * //The modern definition uses the term Blue Moon to mean the second Full Moon in a single calendar month. Using this definition, February is the only month that never has a Blue Moon because the average interval between Full Moons is about 29.5 days. This interval is always greater than the length of February, even in a leap year. ([|Blue Moon Frequency])

The older, traditional definition of a Blue Moon (////Maine Farmers' Almanac//) //uses the term to mean the third Full Moon in a season which has four Full Moons. Normally a season has three full moons. Using this definition, February occasionally does have a Blue Moon! ([|Four full moons]//)** (a.) Write down the years that were leap years since 1900. Make a table to record your information. ([|//Online Conversion//]) (b.) Draw a circle around the ones that have a "Blue Moon"? (//[|Phases of the Moon]//) (//Maine Farmers' Almanac: [|Four full moons in a season]//) (c.) How many did you find? Which years?**
 * [[image:http://www.lexington1.net/technology/instruct/graphics/frog4.gif width="40" height="40" align="left"]]How many leap years during the past 100 years have had a "Blue Moon"?

(since 1900)** || "Modern" Blue Moon Definition** Maine Farmers' Almanac** ||
 * **Leap Years
 * Blue Moon/Date
 * **Blue Moon/Date
 * 1904 || Yes (Mar. 31) || No ||
 * 1908 || No || No ||
 * 1912 || Yes ( May 30) || No ||
 * 1916 || No || No ||
 * 1920 || No || No ||
 * 1924 || No || Yes (Feb. 20) ||
 * 1928 || Yes (Aug. 31) || No ||
 * 1932 || No || Yes (Feb. 22) ||
 * 1936 || Yes (Sept. 30) || No ||
 * 1940 || No || Yes (May 21) ||
 * 1944 || Yes (Oct. 31) || No ||
 * 1948 || No || Yes (May 23) ||
 * 1952 || Yes (Dec. 31) || No ||
 * 1956 || No || Yes (Aug. 21) ||
 * 1960 || No || No ||
 * 1964 || No || Yes (Nov. 19) ||
 * 1968 || No || No ||
 * 1972 || No || Yes (Nov. 20) ||
 * 1976 || No || No ||
 * 1980 || Yes (March 31) || No ||
 * 1984 ||  || No ||
 * 1988 || Yes (May 31) || No ||
 * 1992 || No || No ||
 * 1996 || No || No ||
 * 2000 || No || Yes (Feb. 19) ||
 * 2004 || Yes (July 31) || No ||
 * **TOTAL** || **9 Blue Moon Leap Years** || **8 Blue Moon Leap Years** ||
 * **TOTAL** || **9 Blue Moon Leap Years** || **8 Blue Moon Leap Years** ||

//([|Double Blue Moons])// (//[|List]//)
 * [[image:http://www.lexington1.net/technology/instruct/graphics/frog4.gif width="40" height="40" align="left"]] When was the //last year// that had 2 "Blue Moons"? Answer: 1999 (January/March)

Was it a Leap Year? Answer: NO ([|//Online Conversion//])** //([|Double Blue Moons])// (//[|List]//)
 * [[image:http://www.lexington1.net/technology/instruct/graphics/frog4.gif width="40" height="40" align="left"]] When is the next year that will have 2 "Blue Moons"?** **Answer: 2018 (January/March)

Is it a Leap Year? Answer: NO** //([|Double Blue Moons])//**
 * [[image:http://www.lexington1.net/technology/instruct/graphics/frog4.gif width="40" height="40" align="left"]] How often does a double blue moon occur? Answer: About 4 years per century