Tomorrow night, when the full moon rises over North America, it will be a “blue moon,” the first such occurrence to fall on December 31st since 1990.

The modern definition for “blue moon” is the second full moon to occur within a calendar month and tomorrow’s full moon will indeed be the second to occur in the month of December, 2009.

Cartoon Image courtesy of NASA.

But wait - there’s more to the blue moon phenomenon . . .

From NASA

Most months have only one full Moon. The 29.5-day cadence of the lunar cycle matches up almost perfectly with the 28- to 31-day length of calendar months. Indeed, the word “month” comes from “Moon.” Occasionally, however, the one-to-one correspondence breaks down when two full Moons squeeze into a single month. Dec. 2009 is such a month. The first full Moon appeared on Dec. 2nd; the second, a “Blue Moon,” will come on Dec. 31st.

This definition of Blue Moon is relatively new.

. . .

The modern definition sprang up in the 1940s. In those days, the Farmer’s Almanac of Maine offered a definition of Blue Moon so convoluted that even professional astronomers struggled to understand it. It involved factors such as the ecclesiastical dates of Easter and Lent, and the timing of seasons according to the dynamical mean sun. Aiming to explain blue moons to the layman, Sky & Telescope published an article in 1946 entitled “Once in a Blue Moon.” The author James Hugh Pruett cited the 1937 Maine almanac and opined that the “second [full moon] in a month, so I interpret it, is called Blue Moon.”

That was not correct, but at least it could be understood. And thus the modern Blue Moon was born.

. . .

The modern astronomical Blue Moon occurs in some month every 2.5 years, on average. A Blue Moon falling precisely on Dec. 31st, however, is much more unusual. The last time it happened was in 1990, and the next time won’t be until 2028.

During our visit to the home improvement center today, I saw these beautiful cymbidium orchids in the hothouse. I looked on the internet and found out this variety is probably called “Diane Falk.” I presume they’re named after the developer of this cultivar. Click on the image to enlarge.

Being a long-time astronomy enthusiast, I am very glad that the Hubble Space Telescope is busily producing magnificent images such as this one of Barred Spiral Galaxy NGC 6217, seen on today’s Astronomy Picture of the Day:

From the HST website:

For the past three months, scientists and engineers at the Space Telescope Science Institute and Goddard have been focusing, testing, and calibrating the instruments. Hubble is one of the most complex space telescopes ever launched, and the Hubble servicing mission astronauts performed major surgery on the 19-year-old observatory’s multiple systems. This orbital verification phase was interrupted briefly July 19 to observe Jupiter in the aftermath of a collision with a suspected comet.

Hubble now enters a phase of full science observations. The demand for observing time will be intense. Observations will range from studying the population of Kuiper Belt objects at the fringe of our solar system to surveying the birth of planets around other stars and probing the composition and structure of extrasolar planet atmospheres. There are ambitious plans to take the deepest-ever near-infrared portrait of the universe to reveal never-before-seen infant galaxies that existed when the universe was less than 500 million years old. Other planned observations will attempt to shed light on the behavior of dark energy, a repulsive force that is pushing the universe apart at an ever-faster rate.

Click on the image above to enlarge.

A funny one I have not seen before . . .

Very clever . . .

Via Planet Gore.

Gore once famously said, when caught telling one of his many falsehoods, “it’s occasionally necessary to ‘over represent’ the emergency, in order to propel the case forward.” Well, here are a few examples of over representing their case.

The photo behind the greeting is the one I took last winter at the Grand Canyon. Click to enlarge. If you would like to see the photo without the lettering, go to Winter Canyon from Lookout Studio.

Merry Christmas, everyone.

To All My Liberal Friends:

Please accept with no obligation, implied or explicit, my best wishes for an environmentally conscious, socially responsible, low-stress, non-addictive, gender-neutral celebration of the winter solstice holiday, practiced within the most enjoyable traditions of the religious persuasion of your choice, or secular practices of your choice, with respect for the religious/secular persuasion and/or traditions of others, or their choice not to practice religious or secular traditions at all. I also wish you a fiscally successful, personally fulfilling and medically uncomplicated recognition of the onset of the generally accepted calendar year 2010, but not without due respect for the calendars of choice of other cultures whose contributions to society have helped make America great. Not to imply that America is necessarily greater than any other country nor the only America in the Western Hemisphere. Also, this wish is made without regard to the race, creed, color, age, physical ability, religious faith or sexual preference of the wishee.

To All My Conservative Friends:

MERRY CHRISTMAS AND A HAPPY NEW YEAR!

Via Andy McCarthy at The Corner.

Via Power Line:

1. Surrendering to Russia over missile defense.
2. Appeasing the mullahs of Iran.
3. Ending the war on terror.
4. Announcing a surge while declaring an exit.
5. Apologizing to France for America’s “arrogance.”
6. Giving DVDs to the British Prime Minister.
7. Siding with Marxists in Honduras.
8. Bowing to emperors and kings.
9. Embracing genocidal killers in Sudan.
10. Throwing Churchill out of the White House.

I say it’s time to throw these clowns out of the White House

Every Christmas season, I don this old Santa pin that I’ve had for many years. I think it’s cute and it makes people smile. Click for big.

Today marks the first day of winter in the northern hemisphere. It’s the shortest day of the year for the Los Angeles area; the solar disk will be above the horizon for only 9 hours and 54 minutes today at our latitude.

The diagram above illustrates the orbit of the Earth around the Sun and highlights the passage of our planet through eight significant portals recognized by cultures for many millennia. Those are the two equinoxes, the four cross quarter days and the two solstices. Today, we pass through the winter solstice for the northern hemisphere.

For more information about the science and lore of these several special days, check out the website Archaeoastronomy.com and have a look around.

Over three and a half years ago, the cat was already out of the bag that the University of East Anglia falsified their data. According to Bob Carter of Queensland, Australia, who wrote an article in March of 2006. We posted it then and will repeat it now that the alarmists have been outed . . .

Global Warming takes a Break

More and more evidence surfaces about the true nature of global warming. Real scientists looking at the hard evidence of the phenomenon, realize that claims of man-made greenhouse gasses causing warming are false.

Right: Current SOHO Sunspot Image.

Professor Bob Carter, a geologist at James Cook University, Queensland, who is engaged in paleoclimate research, wrote this excellent article addressing the “Man-made global warming” myth:

There IS a problem with global warming… it stopped in 1998

For many years now, human-caused climate change has been viewed as a large and urgent problem. In truth, however, the biggest part of the problem is neither environmental nor scientific, but a self-created political fiasco. Consider the simple fact, drawn from the official temperature records of the Climate Research Unit at the University of East Anglia, that for the years 1998-2005 global average temperature did not increase (there was actually a slight decrease, though not at a rate that differs significantly from zero).

Yes, you did read that right. And also, yes, this eight-year period of temperature stasis did coincide with society’s continued power station and SUV-inspired pumping of yet more carbon dioxide into the atmosphere.

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