Thursday, August 28, 2014

What is a "Harvest Moon"?

24 April 2014

The Short Answer (TSA)


The Harvest Moon happens in the autumn and is the full moon closest to the autumnal equinox (the first day of fall — around September 23rd).

But hold on!

I grew up in farm country.  We talked about Harvest Moons without ever figuring out the date of the equinox.  In fact, to many, the Harvest Moon is about the color of the Moon as much as it’s about the timing of the Moon.

A Harvest Moon is orange in color.  Orange full moons are more common in the fall around harvest time.  One reason for the orange moon is that, during the fall, the timing and the angle of the moon-rises keeps the Moon low in the sky.  When the Moon is low, it’s more likely to have an orange or yellow color.

Another reason for the orange moon is the harvest.  When the Moon is low in the sky, it gets an even deeper orange color if the air is full of particles and dust.  During the fall, with many farmers harvesting their crops, the air is filled with dust from the disturbed earth and the shearing of crops in the harvesting process.  So, in farm country, the autumn full (and almost full) moons tend to be particularly orange in color.

So, the Harvest Moon is also a large orange moon low in the fall night sky.

M Grossmann of Hazelwood, Missouri
(& Belleville, Illinois)
14 April 2014
About the Author

Tuesday, August 26, 2014

What is a “Barley Moon”?

21 August 2014
The Short Answer (TSA)


            The “Barley Moon” is the Full Moon in the month of September.  Properly, the term “Barley Moon” refers to a period of time – one whole cycle of lunar phases.  So the Barley Moon begins with the New Moon just before the Full Barley Moon in September and continues until the next New Moon.

            The Farmers Almanac calls the September Full Moon the “Harvest Moon” in North America.  And the September Full Moon in England (United Kingdom) is also called the “Harvest Moon.”  So, where did this “Barley Moon” come from?

            Barley was one of the most important crops in medieval England.  Like wheat, you could “do everything” with barley.  Of course, you actually couldn’t do everything with barley, but human beings could live pretty well as long as the barley crop came in.

            Barley was used as currency.  The length of a barleycorn was unit of measurement.  You even had a building in which you stored your barley: the word, “barn,” comes from an early form of the word “barley.”  If you got bored with barley bread, you could always enjoy a barley drink.  The first alcoholic beverages in Europe were beer-type drinks brewed with barley. 

            As more and different types of crops were grown, the September Full Moon stopped being just the Barley Moon and became the Harvest Moon.

M Grossmann of Hazelwood, Missouri
(& Belleville, Illinois)
About the Author
21 August 2014

Saturday, August 23, 2014

What is a “Moon Ring”?

21 August 2014
The Short Answer (TSA)



            A ring of soft light or luminescent ring sometimes forms around the Moon on dark nights.  This “halo” is caused by the Moon’s light passing through millions of ice crystals high in the atmosphere. 

            Traditionally, a ring around the Moon meant that storms were on the way.  And, in fact, a ring often appears when the Moon can be seen through a thin layer of clouds covering the sky.   The thin layer is made up of cirrus clouds, which often do come a few days before a storm front.

            Because of the shape of the ice crystals, rings form a circle around the Moon that is always about 22 degrees away from the Moon itself.  How far is 22 degrees?  Well, looking up in the sky, extend your arm toward the Moon and look at the size of your hand.  That’s about 22 degrees.

M Grossmann of Hazelwood, Missouri
(& Belleville, Illinois)
About the Author
21 August 2014 

Thursday, August 21, 2014

What is a “Moonraker”?

21 August 2014
The Short Answer (TSA)

            Sometimes, people from the Wiltshire County in the West Country of England are called “Moonrakers.”  And, there’s a legend behind that name.

Moonraker Postcard 1903

            There was a time when smuggling was a popular past time in England.  Smugglers would unload “imported” goods from ships landing on the south coast and carry these over secret routes to inland customers.  One of these secret routes passed directly through Wiltshire County. 

            As the story goes, some county residents had hidden a few smuggled barrels of French Brandy in the village pond.  Late, on the night of a full moon, the smugglers took rakes to the pond and used them to try to retrieve the submerged brandy barrels. 

            The worst happened.  They found themselves surrounded by the King’s Revenue Men.  This was every smuggler’s nightmare. 

            Thinking quickly, one of the locals explained that they were using the rakes to try to retrieve a round cheese from the pond.  With the straightest of faces, the smugglers pointed to the full moon’s reflection on the water’s surface -- pretending that they had mistaken the reflection for a submerged cheese.

            The revenue men, thinking that they had come upon some foolish country folk, had a good laugh and went on their way. The local smugglers, wisely, retreated, but returned another night and retrieved the brandy.  The Wiltshire smugglers had the last laugh.  And, after all, he who laughs last, laughs best. 

            The legend existed long before it first appeared in print in 1787.  A good deal of research has been done find the legendary pond.  The most likely location goes to Crammer Pond at Southbroom, Devizes in Wiltshire.  But, there is another villiage laying claim to both the story and Crammer Pond. 

            Residents of the rival village, Bishops Cannings, located a few miles north of Southbroom, claim that the pond used to belong to their village.  As they tell it, a change in the parish boundaries, in 1835, replaced Crammer Pond with the neighboring village of Southbroom..  But, then, many villages with other ponds, also, claim to the be original location of the story.  

M Grossmann of Hazelwood, Missouri
(& Belleville, Illinois)
About the Author
21 August 2014

Monday, August 18, 2014

What is the Moon’s “Syzygy”?


14 August 2014
The Short Answer (TSA)

            Actually, the Moon, alone, can’t have “syzygy.” In astronomy, the word syzygy requires at least 3 “celestial bodies” positioned in a straight line.

            So, at the Full Moon, the Earth is exactly between the Sun and Moon.  Viewed from space, the 3, Sun, Earth and Moon, would appear to form a straight line.  And this is called a syzygy.  At the New Moon, the Moon is exactly between the Sun and Earth.  Again, if you could see the 3, Sun, Moon and Earth, from a point out in space, they would appear to form a straight line.  And, again, this is another syzygy.



            Sometimes the word syzygy is misused to describe an alignment of 3 or more planets in our solar system.  For example, the conjunction of (all in the same place in the sky) Venus, Mars and Jupiter, might is sometimes be called a syzygy.


            But to be a true syzygy, the alignment must have gravitational effects within the system.  Most obvious are the gravitational effects of New and Full Moon syzygies on the ocean tides.  Formal scientific study reportedly shows that the positions of the Sun and Moon do not affect earthquake or volcanic activity on the Earth.  But it is known that New and Full Moons cause gravitational stress on the Moon and trigger “moonquakes.”

M Grossmann of Hazelwood, Missouri
(& Belleville, Illinois)
About the Author
14 August 2014

Thursday, August 14, 2014

What is a “Micromoon”?

17 July 2014

The Short Answer (TSA)

Micromoon & Supermoon

The Supermoon gets a lot of attention.   But it’s opposite, the “Micromoon,” is often neglected.  A Supermoon is any Full or New Moon that happens when the Moon is closest to the Earth.
The Moon has an “irregular” orbit around the Earth.  So, sometimes the Moon is much closer than at other times.  The Moon is said to be at its “perigee” when it is closest to the earth.  When the Moon is both (1) a Full Moon and (2) making its closest approach to the Earth, it is called a Supermoon.  A Supermoon is worth looking at because the Moon in the sky looks visibly bigger as it gets closer to the Earth.
But the opposite also happens.  When the Moon is farthest from the Earth, it is said to be at its “apogee.”  When the Moon is both (1) a Full Moon and (2) farthest from Earth, it is called a Micromoon.
Why does the Micromoon get so little attention?
First, "the smallest Moon you could ever see in the sky" just seems like a “smaller” event than "the largest Moon you could ever see in the sky."
Second, Supermoons are wrapped up in a controversy.  When the Moon is close to the Earth, it exerts more gravitational pull on the Earth.  For example, the ocean tides are stronger when the Moon is closer to the Earth.
Some believe that the Super Full Moon causes earthquakes and volcanic eruptions.  The theory is that, when the Sun and Moon are on opposite sides of the Earth, pulling in opposite directions, the gravity “tug-of-war” puts extra strain on the surface of the Earth.  And, when there's not only a Full Moon, but the Moon happens to be at its closest approach to the Earth, the increased gravity is more likely to cause disturbances like earthquakes.
Some believe that more stress is put on the Earth's surface at the New Moon, when both the Sun and Moon are together on one side of the Earth.  And, when the New Moon is also a Supermoon, with the Moon at its closest approach to the Earth, the gravity exerted on the Earth’s surface is at its very strongest.  So, does gravity from Super New or Full Moons cause earthquakes or volcanic eruptions?
Although there seems to be logic to the idea that more gravity could affect the surface of the Earth, science says no.  Studies have not produced any evidence that the Sun and the Moon, even when the Moon is at its closest, produce enough "extra" gravity to cause anything like an earthquake or volcanic eruption.  However, others disagree.
At any rate, the forgotten Micromoon is the smallest (not the biggest).  So, because the Microoon is farthest away from the Earth, it has the weakest gravitational pull on the Earth.   No one thinks the Micromoon could cause any trouble.  So, there is no controversy -- with the result that Micromoons gets very little attention.
Any Full Moon, when the Moon is more than 250,000 miles away, is a Micromoon.  When it comes to Micromoons, only Full Moon's count.  New Moons seem to be ignored.   So, a New Moon would not be called a Micromoon even when the Moon was more than 250,000 miles away.
The next Micromoon happens on 5 March 2015.


M Grossmann of Hazelwood, Missouri
(& Belleville, Illinois)
About the Author
17 July  2014

Sunday, August 10, 2014

What is a “Sturgeon Moon”?

7 August 2014

ALERT: FULL SUPERMOON (& STURGEON MOON) ON SUNDAY 10 AUGUST 2014

ALERT: PERSEIDS METEOR SHOWER PEAKS TUESDAY 12 AUGUST 2014

(Author: I'm an old skywatcher.  About 12-15 yearly meteor showers appear on most lists.  But all the others together can compare with this one.  You'll be able to see some activity, not just on Tuesday, but on the nights of Monday the 11th and Wednesday the 13th.  Some books say (correctly) that the best time to watch is in the wee hours of the morning.  True enough.  But there's still plenty to see just after dark -- if you want to take the kids out to watch!)

The Short Answer (TSA)
            The “Sturgeon Moon” is the Full Moon that happens in the month of August.  Only rarely are there more than one Full Moon is a particular month.  There are several different names given to the Full Moon of each month.  The Farmer’s Almanac is the source of the name “Sturgeon Moon” for the Full Moon in the month of August. 
            But the “Old Farmer’s Almanac” got the name from Native American tribes.  The first European settlers in colonial American lived in what is now the Northeastern United States.  For the fishing Native American tribes, including the Algonquin tribes of the region, the August Full Moon was the “Sturgeon Moon.”  The tribes picked the name because August was a good month for catching large fish like the sturgeon in the Great (and other large) Lakes. 

A Sturgeon
            Other tribes in other regions had other names for the August Full Moon.  But The Farmers Almanac picked-up the name “Sturgeon Moon” and it stuck.  Many almanacs and other listings of American names for the Full Moons still favor “Sturgeon Moon” for the month of August.
            By the way, this August wasn’t one of those rare months with two Full Moons.  But what would have happened if a particular month of August had two instead of just one Full Moon? 
            The first Full Moon would be called the “Sturgeon Moon.”  The second Full Moon wouldn’t have a special month-related name.  A second Full Moon is so rare that it’s called a “blue moon.”  A “blue moon” isn’t blue in color.  The name “blue moon” is used to describe something that very rarely happens – like two Full Moons in a single month.  The phrase, “Once in a blue moon” is used to mean “rarely” -- "only once in a very great while."

M Grossmann of Hazelwood, Missouri
(& Belleville, Illinois)
About the Author
7 August 2014

Thursday, August 7, 2014

What is a “Supermoon”?

7 August 2014     

ALERT: FULL SUPERMOON ON SUNDAY 10 AUGUST 2014
ALERT: PERSEIDS METEOR SHOWER PEAKS TUESDAY 12 AUGUST 2014

The Short Answer (TSA)

            It’s a bird!  It’s a plane!  No it’s . . . Super Moon?

            The name Supermoon was first used by Richard Nolle in 1979.  There is a Supermoon whenever the Moon, in its orbit, is closest to the Earth at the time of a New Moon or a Full Moon. 

            During the New Moon phase, none of the Moon’s face is sunlit.  So you won’t see a New “Super” Moon in the sky.  On the other hand, when Full, the Moon is at its biggest and brightest.  And if you are particular about your big, bright Moons, the Full “Super” Moon if for you.  At that time, not only is the Moon Full, but its about as close as the Moon gets to the Earth.  What does this all mean?  The Full “Super” Moon is the largest Full Moon you can see in the sky.

            The Moon follows an “irregular” orbit around the Earth.  In other words, the Moon isn’t always the same distance from the Earth.  When the Moon is closest, the astronomical term is “perigee.”  When the Moon is farthest away, it’s called the term is “apogee.”  If you look at the pictures, below, you’ll understand that there’s a noticeable difference in size between the closest (perigee) and farthest (apogee) Full Moon.


Moon at its farthest away (apogee) & Moon at its closest (perigee)

            Technically, we have a Supermoon whenever there is a Full Moon or a New Moon “near” the time of the closest approach of the Moon to the Earth.  How “near” is “near?”  Near is whenever the Moon within 90% of its closest approach (perigee). 

            Well, percentages are notoriously confusing, so I did some checking.  If you are interested, according to Richard Nolle, it’s good enough to say that whenever (1) there is a New or Full Moon and (2) the Moon is less that 368,630 kilometers or 229,057 miles from the Earth, you’ve got a Supermoon.

            Question: Since you can’t see the Moon during the New Moon phase, why would anyone care whether it’s “bigger?”  In other words, why would anyone bother to call an invisible New Moon a “Supermoon?”  The name “super” seems to be “overselling” the Moon at a time when you can’t even see it.

            Answer: “Supermoon” is not an astronomer’s term.  In astronomy, the Supermoon is called “perigee-syzygy.”  That is, perigee = Moon closet to the earth.  And, syzygy = alignment of the Sun, Moon and Earth.  And to take the meaning of “syzygy” to the next level: the only alignments of the Sun, Moon and Earth are -- you guessed it – when the Moon is New or Full.

            Anyway, with a formal name like “perigee-syzygy” it’s easy to see why the name “Supermoon” caught on.  But where did the term “Supermoon” comes from?  It’s an astrological term, but “astrological” can have two meanings. 

            Sometimes, “astrological” refers to a belief that the position of the Sun, Moon and planets, at the time of a person’s birth, correspond to personal traits of character.   And, comparing the planets positions at birth with, later, planetary movements are thought to mark certain types of later life events. 

            But when professional scientists use the word “astrology” they are sometimes referring (unfavorably) to a theory suggesting that an astronomical event has an effect on the physical Earth.  And that is just what Mr. Nolle was suggesting when he coined the name “Supermoon.”  Mr. Nolle relates the occurrence of earthquakes and volcanic eruptions to alignments of the Sun and Moon in relation to the Earth. 

            At the New Moon, the Sun and Moon are both together exerting a gravitational pull on one side of the Earth.  At the Full Moon the Sun and Moon are on opposite sides of the Earth gravitationally pulling on the Earth from both directions.  If the Moon is New or Full, at the same time that it’s closest to the Earth, (a supermoon), the gravitational pull is even stronger.  So, could Supermoons cause earthquakes?

            The scientific community says no.  There is no evidence that these alignments exert enough gravitational force to affect anything other than the ocean tides.  Mr. Nolle disagrees asserting that if you use his time windows and look for earth movements (earthquakes) of particular magnitudes, Supermoons coincide with certain types of geological events. 

            Mr. Nolle’s own explanation of what he means by a Supermoon appears in the link below.  A complete explanation would change this post from a “short” answer to a “long” answer. 

Supermoon: What It Is, What It Means

M Grossmann of Hazelwood, Missouri
(& Belleville, Illinois)
About the Author
7 August 2014

Monday, August 4, 2014

What is "The Dark of the Moon"?

15 May 2014

THE SHORT ANSWER (TSA)



Generally, “the dark of the moon” is a term referring to the period of three days before the new moon.  Is this the “definitive” definition?   Well, I don’t know that there is one.  But “the dark of the moon” is not an astronomical event.  Rather, in folklore, “the dark of the moon” is a period that is often considered unfortunate or difficult. Historically, the dark of the moon has had many meanings to many people, but there are certain consistent features that are worth outlining.

First, many confuse the term, black moon, with “the dark of the moon.” A black moon is just another term for the new moon. The new moon is that point in the lunar cycle when the sun and moon are in roughly the same location in the sky.  At the time of the new moon, viewed from the earth, the moon can’t be seen in the night sky.

Then, as the moon moves farther and farther away from the sun, we see a crescent moon at night. What we will continue to see is the moon reflecting more and more of the sun’s light as the moon moves farther and father away from the sun.  Finally, the moon grows to full – a time when the moon is opposite the sun’s position in the sky. At full, as seen from the earth, the moon fully reflects the sun’s light.   After that, the bright area of the moon begins to shrink again until even the crescent disappears.

For the three days before the next new moon, there is no moon to be seen in the sky. Again, this is “the dark of the moon.”

Since before the dawn of recorded history, it was believed that things begun, when the moon is growing (“waxing”) from new to full, will “increase.” Similarly, things begun, when the moon’s light is shrinking (“waning”) from full to new, will tend to “decrease” or disappear. This traditional belief lives on in agriculture, with almanacs carefully listing lunar phases so that crops can be planted during the growing, or waxing, moon.

To keep it simple, let’s say that the period of the shrinking (or waning) moon is believed to be less “fortunate” than the period of the growing (or waxing) moon. But don’t take this strictly. Some people begin weight-loss diets during the decreasing, or waning, moon because the dieter wants their appetite to decrease rather than increase.

Sometimes, it all gets a bit confusing.

But if the shrinking, or waning, moon is a time of decrease, then the last few days of the decrease – a time when the moon has completely disappeared from the sky – can’t be too good.

I can’t find a single clear description of the effects of “the dark of the moon,” but the lore goes something like this. In days gone by, the disappearance of the moon was considered quite “unfortunate.” When the moon was visible, the world remained, more or less, in order. But the times when the moon wasn’t visible, during (1) an eclipse or (2) the dark of the moon or (3) even when the moon was only covered by clouds in an overcast sky, were associated chaos and disorder.

But what do we mean by a time of chaos? Well, a time when anything could happen, no matter what precautions you might take. You may have heard the saying, “life isn’t fair.” Well, let’s just say, during the dark of the moon, the world around us might grab that “unfairness” ball and run with it.  The dark of the moon was thought to be time when even the best plans were likely to fail and the greatest precautions might not offer protection.

Chaos is not generally considered a good thing but, if you could have bad luck, you’d think you could also have good luck during such times. But that doesn’t seem to be the case. Historically, the dark of the moon was considered, at least, a treacherous period and never a time of pleasant events.

On the other hand, the dark of the moon has a familiar and, somehow, appropriate set of associations. Being the very end of the period of the waning moon, it was not considered a good time to begin projects or enterprises. Also, it was, understandably, associated with death.  The light of the moon diminishes until the “old moon” dies. Another term for “the dark of the moon” is the “dead moon.”

But, then again, death is associated with renewal. So the dark of the moon is the final period of break-down and clean-up before the birth of a new moon.   Actually the dark of the moon is considered, by some, to be a good period for rest and reflection — but, still, not a good period for action.

M Grossmann of Hazelwood, Missouri
(& Belleville, Illinois)
About the Author
15 May 2014

Saturday, August 2, 2014

What is a "Black Moon"?

1 May 2014

THE SHORT ANSWER (TSA)

            The “black moon” refers most directly to the new moon. A new moon is dark with no part of lunar disk reflecting any of the sun’s light. The new moon is, in a way, the opposite of the full moon.   Just as the term “blue moon” refers to the number of full moon’s in a calendar month or calendar season, so, the term “black moon” refers to the number of new moon’s in a calendar month or calendar season.

First, a black moon is the second new moon in the same calendar month. (This can never happen in the month of February.)

Second, if there are four new moons in a particular season, spring, summer, winter, or fall, the third new moon of the four is called a “black moon.” (Only occasionally does a calendar season have four, instead of three, new moons.)

Third, a black moon is a new moon in the month of February when there is no full moon in that same month. (This can only happen in the month of February.)
Fourth, a black moon is a new moon that falls late-January when there is no new moon in the next month (February).

What’s so special about February?

The moon takes a little over 29 days to circle the earth. So, a lunar cycle, (new moon to the next new moon or full moon to the next full moon), always takes a little over 29 days. Every calendar month is longer than a full lunar cycle — except February.    And February is the only month that is always shorter than a full lunar cycle.   So, if a new moon (or full moon) falls on January 31st, the next new moon (or full moon) won’t happen until March.   February will be skipped completely.

Result: Every month must have, at least, one new and one full moon – except February. Also, every month can occasionally have two new moons or two full moons – except February.


I don’t know that the “black moon” is associated with anything other than the new moon. Several sources have suggested that the “black moon” has, sometimes, been given some special historical meaning or significance. But, I believe these comments are the result of confusing the “black moon” with “the dark of the moon.”  “The dark of the moon” is a period of 3 days before the new moon which, in folklore, was believed to be an especially unfavorable time to plant crops as well as begin or advance enterprises of any kind.

M Grossmann of Hazelwood, Missouri
(& Belleville, Illinois)
About the Author
1 May 2014