Celestial Silver Dollar

I walk the dog late at night, just to be sure he doesn’t nudge me awake in the wee hours of the morning. The walk can be a chore when I’m tired but most nights it’s a quiet, peaceful stroll through our pitch-black horse pastures. We’re usually blessed with clear skies here in South Carolina, which means the stars and planets put on a display worthy of a paid ticket to an observatory. Regardless, the moment I’m out the door I’m in search of my other faithful companion: the moon.

Through the trees

The “heavens” offer a plethora of topics to blog about (which I have: Saturn in Of Rings and Romans or Starlink satellites in Celestial Strings of Pearls, for example) but I’m overdue with a few words about the moon. Our nearest galactic neighbor is a constant wonder to me.  The moon (or is it “The Moon”?) is the reason we have ocean tides here on Earth and solar eclipses far, far away.  The moon has been the target of some of the most impressive space technology and exploration in history.  But let’s put the science aside, shall we?  Today I’d rather just muse about the moon as its sits in the night sky, like a shiny silver dollar laid out on top of a black velvet cloth.

My favorite moons are full – the perfectly round ones – but the shadowed partials can be just as beautiful.  Depending on the season and the atmosphere, the moon takes on countless looks.  Some nights it rises giant above the trees, as if invisible binoculars rest before my eyes.  Other nights the moon sits as an elegant crescent, a perfectly white slice of melon.  Still other nights the moon doesn’t rise at all, or at least, not until well after I’m in bed.  It’s a guessing game every time the dog and I head out into the dark.

I also make a game of trying to guess when the moon is full just by looking at it.  On the nights just before or after it occurs the moon can still appear as full.  So you have to look very carefully at the edges to decide if it’s perfectly round or not.  Conveniently, the moon is full about once a month, or at least, once every month in 2024.  Next year or the year after, perhaps we’ll get a “blue”: that second full moon in a calendar month.  Doesn’t happen very often, of course.

Here’s a fascinating fact about the moon.  It’s locked into place by the earth’s gravity, meaning it’s always showing you the same face.  Try to picture the earth taking a trip around the sun (once a year or so), while it’s spinning on its own axis (once a day), while the moon is spinning around the earth.  Technically the moon is rotating, just not on its own axis.  So you never get to see “the dark side”.

Here’s another fact that makes me pause.  If you drive across the United States from coast to coast and back again, you’re driving about 6,000 miles.  Do that same drive thirty times and you’ve driven to the moon.  Suddenly our celestial silver dollar doesn’t seem so far away, does it?

The next full moon (from my perspective), nicknamed “The Wolf”, is a week from this posting, on Thursday, January 25th.  It’ll be the first full one of the new year.  Good timing really, because some of you readers don’t make it to my blog until several days after the fact.  If you’re exactly a week late, walk outside tonight after dark.  A spectacular scene in the heavens awaits.

Some content sourced from Wikipedia, “the free encyclopedia”.

Sphere Elegance

I love full moons.  They look a little too perfect to be one of nature’s essential elements and too large for the vast universe that surrounds them.  Yet there they are, perched silently above the horizon every month or so, beckoning to be plucked out of the night sky.

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We had a full moon last Friday and the next will be in mid-October.  But September’s stands alone, as it is rises closest on the calendar to the “Autumnal Equinox”.  It signals the end of the longer summer days, earning the nickname “Harvest Moon”.

The Autumnal Equinox (AE) takes place on September 22nd.  In fact, I timed the publishing of this post to the exact minute of the AE: 8:21am MDT.  The AE is the instance the earth’s axis is exactly perpendicular to its rotational axis around the sun.  When the axis is straight up and down you have equal amounts of “day” and “night” in that twenty-four hours.  That’s a pretty cool slice of astronomy.

As long as we’re in the classroom, the AE also signals the transition from summer to fall in this part of the world.  Yet anywhere in the earth’s Southern Hemisphere the AE signals the transition from winter to spring.  That fact brings a moment of confusion when you consider the Summer Olympics were just hosted in Brazil, doesn’t it?  At least they had a full moon last Friday, same as everywhere else.

Growing up in a narrow winding canyon, a full moon was a rare sight.  Back then I should’ve thought to wake up in the middle of the night, stand out on the lawn, and stare straight up into the sky to see one.  Maybe I saw a few fulls when I was camping in the Boy Scouts.  Or maybe I just remember them from several of the animated Peanuts specials.  (Charles Schultz was a fan of full moons.  Just watch “It’s the Great Pumpkin, Charlie Brown” next month on TV; or “Snoopy, Come Home” on NetFlix).

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As much as I enjoyed our Harvest Moon, it turns out I have an even bigger lunar event around the corner.  On November 14th we get a “Super Full Moon”.  A Super is the one full moon each year where the orbit of the moon is closest to the center of the earth.  So the Harvest may be big but the Super should be astronomic!

No discussion of full moons would be complete without a nod to the “Blue Moon”.  They say, “once in a blue moon”, and that means not very often.  A Blue is a second instance of a full moon in a calendar month.  There were no Blue Moons in 2016 (except the several I purchased for my own consumption of course).

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Thankfully I no longer live in a narrow winding canyon but instead in wide open spaces.  No fulls can slip by me anymore.  And I assure you, on that Tuesday in November the week before Thanksgiving, I’ll be hanging out in my family room window at dusk gazing east into the sky.  My Super will be on the rise.

Note: Portions of this post are credited to the research found at timeanddate.com.