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john65pennington's avatar

Why is there a new "blue moon" today and how did the No. 13 become to be an unlucky number?

Asked by john65pennington (29273points) November 21st, 2010

Is today an off-day for our universe? Nov. 21st and a second full “blue moon” this month? Does this mean we will have another full moon on Dec. 21, 2010? Question: How did the number 13 become an unlucky number for some of us? Is 13 tied to number of full moons earth will have this year, instead of 12?

Source: Space.com

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13 Answers

Carly's avatar

First: Since today is a full moon, my friends and I are going to go TP someone’s house tonight (probably one of our other friend’s house)

Second: When I was 13 I moved into a house which has the address 13 Fountainhead ct.
Maybe it was just highschool in general, but I had a very unlucky 5 years until I moved away to college.

boffin's avatar

…new “blue moon” today

?
I hope my calculations and info I have is correct….
Thus…
I think you are getting “Full Moon” confused with “Blue Moon“s.
Blue Moons are rare events. Which are two Full Moons in a single month. Won’t have a Blue Moon in 2010. Last Blue Moon was in December 2009. Next Blue Moon, August 2012.
And to clarify the term “New” moon is no moon visible..

Seaofclouds's avatar

There is a second definition for a Blue Moon, in addition to the one @boffin gives above. It states that when there are 4 Full Moons in one season, one of them is a Blue Moon. I forget how they decide which one is the Blue Moon though. We are set to have another Full Moon in Fall on December 21st. December 21st is also the first day of winter, but the actual time of the full moon versus the time of the solstice is what comes into play. The full moon will occur before the solstice, therefore counts as the 4th full moon in the fall.

As far as 13 being unlucky, it’s never bothered me, so I don’t pay much attention to it.

RareDenver's avatar

I think the 13 thing has something to do with 13 witches to a coven or something like that. Ask a witch.

iamthemob's avatar

I believe, and I don’t know if this is definitive, that the “unlucky” aspect of the number 13 is attached to the number of people at the last supper – 12 apostles and Jesus Christ – and theoretically that Judas was the 13th to sit at the table.

However, the number at the last supper could have been derived from the fact that it was already considered a bad number, at least in Western thought.

Regardless of the reason, the word triskaidekaphobia is one of the coolest words in the english language.

BarnacleBill's avatar

One theory is the mass arrest of the Knights Templar on Friday, October 13, 1307. Bad luck for them. Friday was considered an unlucky day anyways.

iamthemob's avatar

@BarnacleBill – I’ve heard that is why Friday the 13th was considered an unlucky day (as opposed to the number 13 generally). I didn’t know it was attributed generally as well…

LostInParadise's avatar

I read somewhere that the numbers that we give magical properties to tend to be small primes. The number 7 is considered a lucky number. The 5 sided pentagram is associated with witchcraft.

lillycoyote's avatar

I know this one!!! I just read something about it yesterday. Here’s the scoop: The Really Strange Story Behind Sunday’s Blue Moon. And according to this article origin of the number 13 being believed to be unlucky indeed is tied to the 13 moons in one year issue.

Anyway, that’s the theory according to this guy.

ipso's avatar

GQ

Great word & link @iamthemob & @lillycoyote

(I love the audacity/contrarian nature of the U.S. first flag having thirteen stars and thirteen stripes. ..Disrespects the “unlucky” superstition about as much as is conceivable.)

boffin's avatar

Full Moon Names and Their Meanings

Full Moon names date back to Native Americans, of what is now the northern and eastern United States. The tribes kept track of the seasons by giving distinctive names to each recurring full Moon. Their names were applied to the entire month in which each occurred. There was some variation in the Moon names, but in general, the same ones were current throughout the Algonquin tribes from New England to Lake Superior. European settlers followed that custom and created some of their own names. Since the lunar month is only 29 days long on the average, the full Moon dates shift from year to year. Here is the Farmers
Almanac’s list of the full Moon names.

• Full Wolf Moon – January Amid the cold and deep snows of midwinter, the wolf packs howled hungrily outside Indian villages. Thus, the name for January’s full Moon. Sometimes it was also referred to as the Old Moon, or the Moon After Yule. Some called it the Full Snow Moon, but most tribes applied that name to the next Moon.

• Full Snow Moon – February Since the heaviest snow usually falls during this month, native tribes of the north and east most often called February’s full Moon the Full Snow Moon. Some tribes also referred to this Moon as the Full Hunger Moon, since harsh weather conditions in their areas made hunting very difficult.

• Full Worm Moon – March As the temperature begins to warm and the ground begins to thaw, earthworm casts appear, heralding the return of the robins. The more northern tribes knew this Moon as the Full Crow Moon, when the cawing of crows signaled the end of winter; or the Full Crust Moon, because the snow cover becomes crusted from thawing by day and freezing at night. The Full Sap Moon, marking the time of tapping maple trees, is another variation. To the settlers, it was also known as the Lenten Moon, and was considered to be the last full Moon of winter.

• Full Pink Moon – April This name came from the herb moss pink, or wild ground phlox, which is one of the earliest widespread flowers of the spring. Other names for this month’s celestial body include the Full Sprouting Grass Moon, the Egg Moon, and among coastal tribes the Full Fish Moon, because this was the time that the shad swam upstream to spawn.

• Full Flower Moon – May In most areas, flowers are abundant everywhere during this time. Thus, the name of this Moon. Other names include the Full Corn Planting Moon, or the Milk Moon.

• Full Strawberry Moon – June This name was universal to every Algonquin tribe. However, in Europe they called it the Rose Moon. Also because the relatively short season for harvesting strawberries comes each year during the month of June . . . so the full Moon that occurs during that month was christened for the strawberry!

• The Full Buck Moon – July July is normally the month when the new antlers of buck deer push out of their foreheads in coatings of velvety fur. It was also often called the Full Thunder Moon, for the reason that thunderstorms are most frequent during this time. Another name for this month’s Moon was the Full Hay Moon.

• Full Sturgeon Moon – August The fishing tribes are given credit for the naming of this Moon, since sturgeon, a large fish of the Great Lakes and other major bodies of water, were most readily caught during this month. A few tribes knew it as the Full Red Moon because, as the Moon rises, it appears reddish through any sultry haze. It was also called the Green Corn Moon or Grain Moon.

• Full Corn Moon – September This full moon’s name is attributed to Native Americans because it marked when corn was supposed to be harvested. Most often, the September full moon is actually the Harvest Moon.

• Full Harvest Moon – October This is the full Moon that occurs closest to the autumn equinox. In two years out of three, the Harvest Moon comes in September, but in some years it occurs in October. At the peak of harvest, farmers can work late into the night by the light of this Moon. Usually the full Moon rises an average of 50 minutes later each night, but for the few nights around the Harvest Moon, the Moon seems to rise at nearly the same time each night: just 25 to 30 minutes later across the U.S., and only 10 to 20 minutes later for much of Canada and Europe. Corn, pumpkins, squash, beans, and wild rice the chief Indian staples are now ready for gathering.

• Full Beaver Moon – November This was the time to set beaver traps before the swamps froze, to ensure a supply of warm winter furs. Another interpretation suggests that the name Full Beaver Moon comes from the fact that the beavers are now actively preparing for winter. It is sometimes also referred to as the Frosty Moon.

• The Full Cold Moon; or the Full Long Nights Moon – December During this month the winter cold fastens its grip, and nights are at their longest and darkest. It is also sometimes called the Moon before Yule. The term Long Night Moon is a doubly appropriate name because the midwinter night is indeed long, and because the Moon is above the horizon for a long time. The midwinter full Moon has a high trajectory across the sky because it is opposite a low Sun.

meiosis's avatar

@iamthemob is right. Thirteen is considered unlucky because that was the number of diners supposedly at the last supper, as described in the Bible.

RareDenver's avatar

Blue Moon? Isn’t that when a Smurf drops his trousers?

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