Alternative Moon Perception

The Moon…as you have never seen it before!

This is the exciting finale to a trilogy of posts about my August 30th Moon adventures.  The first showed the Waxing Gibbous Moon from that night.  The second explored several of the Moon’s craters.  And now here is the story of what came next.

As I finished up my astrophotography for the evening, I detached both the camera and eyepiece setup from my Dobonsian’s focuser.  I had, just moment before, been taking my last pictures, so the Moon was still in the telescope’s field of view.  With the focuser empty, I noticed the very bright light emanating through, like a flashlight.  This was, obviously, the Moon’s light still reflecting from the primary mirror, off the secondary, and through the focuser hole.

I have observed this “flashlight” before, but usually considered it for only a moment as I would be in the process of packing up my equipment for the night.  But on this pleasant evening for the 30th day of August, I decided to play with the light a little.  I put my hand in front of the focuser and could see the blurry image of the Moon upon it.  Moving my hand around allowed me to focus the Moon, directly on my hand.

I thought this was the end of the exercise.  But when I put the dusk plug back onto the focuser, Moonlight was still shining, this time through the translucent plastic.  It is a very simple cap, and if you are unfamiliar with these telescope dust plugs, they look like this.

Adjusting the focuser allowed me to bring the Moon into focus, right on the cover of the dust plug.  It was a strange sight.  It reminded me of the small view screens that attached to some home film projectors in the 1970s.

The Moon, but not the Moon.  Quickly I detached my smartphone from its mount and took several pictures of the phenomenon.  The above is one of those images with only minor post-processing.  The diagonal streaks across the Moon are the grains of the dust plug’s surface.

I got a lot of value out of that Moon observing session.  Right now, the Moon is waning and nearing the next New Moon.  Unfortunately my weather forecast is cloudy through the weekend; I want to get back out there and find Pluto one more time this year.

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Discovering the Moon’s Craters

Section of the Moon on August 30th, 2017.

When I photographed the Moon on August 30th, I felt now was a good time to start examining it at a closer level.  Having only attempted crude drawings of craters previously, I wanted to see how high I could push the magnification of my Dobsonian reflector.  So I replaced the 17mm Plossl eyepiece used for the full disc image with a 7.5mm and Barlow lens to see what I could get.

(I should note here that I was using my smartphone for pictures, hence the afocal method of putting the camera directly to the eyepiece.)

With that telescope, this eyepiece setup magnifies about 333 times!  Although well within the theoretical maximum for a 254mm aperture, it does present challenges with the atmosphere and, closer to home, vibrations when attempting to get a steady photograph.  Many of my attempts came out motion blurry.

The situation presented itself as the ideal opportunity to study the Moon map that came with one of my equipment orders last year.  This particular section of the Moon is near its Southern pole.  At first, I had no idea what I was looking at, as the map and my image appear a tad different due to shadows.  Plus, there are a lot of craters, too many to count!

To pinpoint these specific craters and determine their names, I performed a modified approach to star hopping, but of course for the Moon.  Checking the map, I first leveraged the easy large Mare in the North, then from there simply hopped from large crater to large crater, until I arrived at the location of my picture.

In learning these names and locations, I was humbled to realize how little I know about the Moon.  I have taken lots of pictures for over a year but have never studied the surface.  How does the saying go…I hear but I do not listen?  Surely this is the equivalent for sight.

My embarrassment started when I had no idea the famous Tycho crater is sitting right there in my picture.  It has that internal shadow with a center protrusion.  Below Tycho, the largest crater shown is Clavius, a name I know I have heard before.  It has several smaller craters within.  Maginus and Moretus are also visible.

Here is the same picture, this time with the craters labeled:

This exercise has kindled a desire for me to learn more about the Moon and truly see it in all its amazing detail.  I now know and have seen four craters.  Hundreds more are out there waiting!

Better Than a Quarter Moon

Click for the hi-res image.

August 30th, 2017, 8:59 p.m. local time

Me: “Wow, such an amazing Moon tonight!  I should get my telescope or at least digital camera to take some pictures.”

Me Too: “Well, since you did only a smartphone capture last night, let’s drag the big telescope out for this one.  Even I have to admit this is too good of a Moon to waste.”

Me: “Great!”

Me Too: “Ok.  Just make sure you produce something fantastic worth both our time.”

Two Sides of the Quarter Moon

August 29th, 2017, 7:10 p.m. local time

Me: “Wow, that’s a great looking Quarter Moon tonight!  I should get my telescope or at least digital camera to take some pictures.”

Me Too: “You’re pretty tired.  Are you sure you want to lug all that equipment outside?  Plus, it’s a work night.”

Me: “How about a compromise: I’ll go get my smartphone and snap a few images?  That will take hardly any time at all.”

Me Too: “Ok, deal, but you’re cooking dinner tonight.”

Easy Target

In case you have not heard, the Moon passed in front of the Sun yesterday.  In the grand scheme of astrophotography, this was a sub par event.  The Sun is very near and big and bright, so it doesn’t pose much of a challenge to photograph.  The biggest hurdle for me yesterday was dealing with mostly cloudy skies.  This made positioning of my telescopes very hard, as the normal method for aligning to the Sun is by leveraging the telescope’s shadow.  Fortunately, I had a wide-field refractor nearby which made the task a bit simpler over the narrow view from my 127mm Mak-Cass.  Once the refractor was aligned, troublesome as that was through dense clouds, it gave me cues for aligning the imaging scope.

And no, I did not miss the eclipse by fiddling with my equipment.  As alluded to above, imaging the Sun is kind of boring, even with clouds, so it was not hard to do a few things at once.

Here are the image highlights, in order and taken from a ~88% max coverage location.  Click on each image to enlarge.

This was was taken in Pro mode of my camera. Rest were in Auto mode.

I Do Not Fear Missing the Solar Eclipse

The great solar eclipse of North America has gotten a lot of publicity recently, and rightly so.  It is a script written for movies, a stark event to be witnessed by large areas of a large country.  Everyone from the professional astrophysicist to the completely uninitiated layman will appreciate it.

There is just one small hitch though – the weather.  Cloud cover may potentially block some or all of the eclipse.  This is not unusual for an astronomical affair, with the main casualty here being the lost opportunity due to the infrequency of this particular one’s chance.  The last solar eclipse in North America was over ninety years ago.  The next will be in seven.  After that, likely none of us today will be alive for the solar eclipse of 2099.

Last year, in May 2016, was the latest transit of the planet Mercury across the Sun.  This too is a rare event, though with a frequency of about once every 13 years.  While location on Earth is important, there is still a decent chance you can witness a Mercury transit over the course of 30-40 years.

I was in a prime location for the Mercury transit and had a full seven hours to observe it.  Unfortunately, the clouds that day were like a mockery from the gods, with the densest cover short of a severe thunderstorm.  My days of preparation and planning with telescope and solar filter and camera were fruitless.

Now being days away from the August 21st eclipse, I watch the weather forecasts for Monday like a hawk.  Currently they foretell party cloudy, muggy, with a chance of a thunderstorm, but with an uncomfortable encroachment of rain first in the evening and now late afternoon.  In my area, the eclipse will be at its peak around 13:20 and over by 14:45.

Will I be disappointed if the weather does not cooperate?  Absolutely.  Fortunately, there are a few mitigating perspectives.

First as a practical matter, cloud cover does not necessarily mean the eclipse will not be observable.  The Sun is very powerful and can pierce a variety of cloud formations.  I have taken pictures of star and planets through cloud cover when they were invisible to the eye alone, and have imaged the Sun through clouds as well.  Clouds can actually provide an artistic effect through a solar filter when imaging.

The second is a much longer perspective.  I hope those unfamiliar with astronomy take this as an opportunity to begin their own personal explorations of the cosmos.  A solar eclipse it just one event, but there is so much more to see, so much more to wonder at!  Every clear night offers something spectacular if you know how to observe the sky.

The Moon, the planets, meteors, nebulae, star clusters, galaxies, binary stars, constellations.  Conjunctions, oppositions, Jovian moon transits.  They are all there, if not all the time then at least for long durations annually, every night for the taking.

This will also be a useful opportunity to push the cause of light pollution.  Though the wonders of the cosmos are out there, too much of our planet is plagued by the sickly orange sky glow that ranks with any other pollution source.  Few people know about it, as it is not easy to realize, but artificial lighting at night distorts ecosystems.  If you don’t believe me, try sleeping with your bedroom light on, every night.

So even if the weather forces me to miss the eclipse, I know it will not be the end-all, because of all the amazing things in the sky and all the other astronomical events, including eclipses, to come.  The clouds cannot win every time!

The Backwards Moon

August 13th, 2017, 04:15 a.m. local time

Farmers and early risers will disagree, but I think of the Moon’s waning phases as backwards.  I have been use all my life to seeing the waxing Moon in the evenings.

Attempting to view meteors on Sunday gave me a rare opportunity to photograph a healthy looking backwards Moon at its midpoint sky travel that day.  As I had already prepared my digital camera and tripod for meteor hunting, it was not much effort to first attach a longer lens for the Moon.  Today’s picture is from Sunday morning with only minor touch-ups performed in PaintShop Pro.

Of course, this monthly cycle has special significant as this particular Moon phase gradually creeps Eastward every day to rendezvous with the Sun for the North America solar eclipse on Monday, August 21st.

Moon Rising Above the Clouds

August 1st, 2017, 6:00 p.m. local time

Sometimes the Moon fights despite the Earth’s turbulent weather.  Here we have an example of our satellite breaking free from eastward-moving cloud cover, with a nice patch of blue sky to frame.

This was taken with my smartphone, proving again that these devices have some marginal value beyond looking at pictures of Cheerios.