Thursday, 11 May 2017

Drygalski and Full Moon Mountains, & Getting Back in the saddle

Hi all,

It has not only been a long time since my last DSO sketch, it’s also been a long time between lunar sketches too.

One thing that’s kept me in touch with my scopes has been making bits and pieces for them.  One has been the new case for my SCT that I posted a few weeks ago.  I’ve also changed the secondary holder and spider of my 17.5”.  I’ve now also modified the large fine focus knob I made for my SCT.

I made a large dial knob for both my old orange tube SCT and one for my new instrument.  However, just making the same thing all over again left me feeling a bit ho-hum about it.  It lacked a little bling.  So, after a friend asked me to make a new pimped up dial for a controller of a scope of theirs, I went to town on mine!  It looks like a 19th century time machine exploded all over it!  As some of the gears have a lot of height to them, I first had to make sure that the position I put them in did not interfere with the operation of the scope nor with stowing it.  This Steampunk treatment complements the timber of the knob, and has given me ideas on how to possibly give the Steampunk treatment to the new case for this scope.  I also have a few old glass electronic valves that I can use for this exercise.

This week also saw the lunar drought break for me with two sketches!  Hooray!

Sunday night proved to be the break of the drought with a gorgeous clear night.  My initial examination of the Moon threw up two great sketch candidates.  One was around the elongated crater Schiller that I’ve been wanting to pen for some time.  This area is very busy.  The other area was around Aristarchus, with the sun just illuminating its rim edge, and a more gentle area of smoother Maria.  Not having sketched the Moon for so long, I felt very rusty and in need of getting my eye in again before tackling something like Schiller.  Also, with seeing not being too flash, I felt that I would struggle more with a more detailed crater ridden area compared with a more smooth plain area.

Dawn Rising Over Aristarchus proved to be a most enchanting piece.  The flat maria lunar surface is rolling back around the Terminator, giving a lovely 3D effect, and the shadows cast by the nearly totally flooded crater Prinz and a series of lone mountains next to Prinz, made for a wonderful juxtaposition between light and shade, giving a lot of drama and precious detail to the piece.

Object:  Dawn over Aristarchus and Oceanus Procellarum
Scope:  8” SCT
Gear: 9mm TMB Type II, 223X
Date:  7th May, 2017
Location:  Sydney, Australia
Media:  Soft pastels, white ink and charcoal on A5 size black paper

Drygalski and Mountains During Full Moon was done a couple of nights later on the Wednesday that followed.  Smack bang in the middle of the Full Moon phase!

I LOVE the full Moon!  LOVE it!

Most astronomers wouldn’t even think about hauling out a scope during the full Moon.  Me, I see it as the perfect time to spot one of the most striking features on the Moon itself,  its mountains and lunar scape seen from profile, instead of just from above!

Most people think that there are no shadows to be seen during the full Moon.  Not so!  The only time that there would be no shadows visible is during a lunar eclipse, which is the only time that the sun’s rays fall perfectly perpendicular on the Moon to us.  But as the Moon most often orbits the Earth above and below the Earth’s orbital plane, some degree of shadows been cast will always be seen.  And the full Moon phase allows for a most extraordinary display of shadows cast over hills, rolling plains and behind mountains.  A most extraordinary sight.

I have sketched Drygalski before.  However, libration of the Moon had it in a much more favourable position that first time, with the crater floor visible then, but totally black filled this time.  It and every other crater is VERY squashed and elongated due to foreshortening.  And as the scene is such a wonderful field, I had to sketch this spot to a much wider size.

Object:  Crater Drygalski and Mountians during the Full Moon phase
Scope:  8” SCT
Gear:  9mm TMB Type II, 223X
Date:  10th May, 2017
Location:  Sydney Australia
Media:  Soft pastels, white ink and charcoal on A5 size black paper.

Two widely different scenes, one Moon.


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