Transit of Mercury

transit of mercuryI set up the telescope in the last patch of afternoon sunlight on our back lawn and catch an image of Mercury mid-way through its transit across the Sun. This is the first time that I’ve seen Mercury: as we’re in a valley, we’re never well placed to see its brief appearances at dawn and dusk.

transit telescope

I don’t have a solar filter for the telescope so I project an image onto a sketchbook page, then photographed the image. I feel that it’s safer to project anyway: a friend accidentally burnt out the lens of his smart phone when he moved his telescope into position, having briefly removed his solar filter to make it easier to level up the shadow. That’s £70 for a replacement lens but you can’t replace an eye as easily.

projection

Sunspots
Detail from the projected image of the solar disc. Sunspots appear in pairs, magnetically charged as north and south: imagine a horseshoe magnet connecting them beneath the photosphere.

Squeezing my camera in between telescope and sketchbook to take the photograph resulted in an oblique view of the solar disc so I skewed and stretched the image in Photoshop to fit into a yellow circle (top image).

planetsIf we could see the Earth’s silhouette alongside that of Mercury, it wouldn’t be much bigger than the larger sunspot (left).

Seeing the progress of Mercury across the solar disc gives an impression of the scale of the Solar System; 99.8% of the mass of the Solar System is contained in the Sun.

A Smile in the Sky

cloudy skyWe’re disappointed that, with a near total eclipse due at about 9.30 this morning, cloud is covering the eastern sky but we’ve located our eclipse glasses from 1999, so, with ten minutes or so to go, eclipseI try looking towards the bright patch in the bank of cloud.

I’m astonished and delighted to see, in sharp focus, the disc of the Sun neatly perforated by the eclipsing Moon.

eclipse 2015As it progresses towards near-totality, the crescent shrinks to a slither which reminds me of the end of a finger-nail but which has been better described as a smile in the sky.

eclipse near maximum

It gets surprisingly dim considering that there’s still a blazingly bright crescent behind the thin cloud. The birds go quiet as if tricked into thinking that night is fast approaching.

A Second Sunrise

As the Sun’s disc begins to reappear there’s strange kind of second sunrise. It’s like sunrise but more brilliant, because the Sun is already quite high in the sky. The brightness over the fields reminds me of sunrise on the east coast where light reflected off the sea intensifies the growing brilliance.

Total eclipse, 1999.
Total eclipse, 1999.

I’m reminded not just of the total eclipse in France sixteen years ago but more recently of an annular eclipse that we viewed from Sandsend; a ring of fire rising above a hazy North Sea.

Back in 1961 I was lucky to be able to observe a partial eclipse by looking through smoked glass in the school playground at St Peter’s Junior’s, Horbury. We were told then that the next total eclipse visible in England would be visible from Cornwall in 1999. It seemed an impossibly long time in the future but I remember thinking how amazing it would be to see it. When the time came, the easiest option was for us to go and stay with my penfriend from schooldays, Philippe, in Lille. We made the right choice because on the day thick cloud obscured the eclipse in Cornwall.

A Wind from the West

windswept treesVeils of grey cloud in ripple-mark patterns scud along from the south-west against a pearly glare which is all we can see of the midday sun. The wind up here at Birstall retail park flattens the spring loaded signs, bends the trees and grabs at the doors of the Pizza Express  so that the waitress has to reset the door-opening mechanism.

Comet Hunting

before dawnI’D HEARD that not much of Comet ISON had survived its close encounter with the sun but I took a quick look out of the studio window just before dawn just in case.

Even scanning with binoculars, I couldn’t see any traces but conditions weren’t ideal as there was a glow of streetlights over in the direction of Wakefield and a low bank of cloud was beginning to form in the east.

Juvenile Gull

herring juvenileAfter a couple of sessions sketching from hides I thought I’d take the opportunity to work in more detail from a photograph on my iPad as we sat in a waiting room yesterday, which probably explains why the proportion of head to body has gone awry. Colour added later.

The juvenile herring gull, photographed in September, was swimming along on Peasholm Park lake, Scarborough, looking rather worried as we passed by in our dragon-boat pedalo.

Herring gulls don’t moult into their full adult plumage until their fourth year.

My Dr Who Diary

Lett's Schoolboy's Diary

I’M ONE of the generation who can remember where they were when they heard the news of the assassination of  President Kennedy (just returned from the Friday evening church youth group) fifty years ago but I’d forgotten that the following day saw a happier event when the first episode of Dr Who was broadcast.

Dr WhoI’m travelling back along my own timeline by digging out my 1963 Lett’s Schoolboy’s Diary from the attic. Unfortunately the only event that I recorded for November that year was bonfire night. Not very helpful in building up a picture of the era.

My shiny new 1964 diary.
My shiny new 1964 diary.

I didn’t get into my stride with a diary until the following year but when, aged twelve, I started so enthusiastically (I dropped the colour after 3 weeks) we were still mid-way through the first series of Dr Who so a Dalek appears in my entry for Saturday 4 January;

‘Doctor Who was good today’.

I hadn’t quite got the hang of critical reviewing. In the previous year on the ‘Films seen during the year’ page of my diary I’d summed up Ben-Hur as ‘a good film’ but Tarzan goes to India got a more in-depth review; ‘some excellent elephant shots’. No wonder big screen spectaculars made such an impression on me as television was still 405 lines and black and white. But, as you can see from my postage stamp-sized sketch, the new science fiction series was a hit with me and I could imagine it bursting into colour.

At the barber's, 4 January.
At the barber’s, 2 January.

Unfortunately I no longer have two pieces of Dr Who memorabilia from the 1970s and 80s. One was a sketch that I made of one of the later Doctors, Sylvester McCoy, at a book awards event , the other a copy of Dr Who script editor Terrance Dicks’ paperback guide to the first ten years of the series. But where those two items ended up suggests the effect of the show on the creative imagination of children.

I’d asked Sylvester McCoy to sign the sketch for my nephew Damian, who was Dr Who mad and who would often wear a dressing gown and an extra long scarf, like his hero. And occasionally a piece of celery in his button-hole like Peter Davison’s Dr Who.

3 January, using my chemistry set, a Christmas gift from my parents.
3 January, using my chemistry set, a Christmas gift from my parents.

Damian has apologised to me for losing the sketch years ago! But he is now an architect so if you think you can detect a Cyberman or Dalekian influence in a building, it could be one of his.

The paperback went to Wilfrid, the son of one of my art college tutors, who sometimes quizzed me about the early episodes as he could remember only as far back as Jon Pertwee. Wilfrid went on to create puppets for Spitting Image including an irradiated sea monster for the French version of the show which wouldn’t have been out of place in Dr Who.

The fondly remembered American science fiction series The Outer Limits also features in my diary. Much as I appreciated the Doctor, I liked the slicker (for the time) production values of The Outer Limits and I liked the way that, as a series rather than a serial, you would find yourself in a completely different imaginative world with each one hour episode.

The Beverley Hillbillies

The Beverley Hillbillies Television shows feature a lot in the diary including including The Beverley Hillbillies (Friday 4 January). The six o’clock comedy slot on ITV, which included such series as My Favourite Martian, Mr Ed and Petticoat Junction, was a feature of week-day evenings; a break between school, tea and an evening session homework. pen

Some things never change. January 4: ‘I did my homework with my new pen (3/6).’

Half a century later my search for the perfect pen, the one that’s going to improve my handwriting and my drawing, continues.

My fascination with any technology which would help me to see the world around me in a different way had already started too;

telescope
Looking out over the railway and Storrs Hill road.

2 January; ‘I went on a walk over Storrs [hill] down to Horbury Bridge. Tested telescope.’

telescope

This was a pocket-sized telescope/microscope but the sky was the limit as far as my ambitions were concerned and later in the year I saved up to buy a reflecting telescope kit (£7 from Charles Frank’s of Glasgow).

I remember the thrill of seeing the tiny points of light of the stars come into focus scattered against the inky blackness; that feeling of looking into the depths of space. And of course back in time too . . . perhaps the light from some of those stars had been travelling for fifty years . . .

15 September 1964; ‘Got 50 lines ughh! for not backing book. Did homework. At 8.15 pointed (with Mum’s help) the telescope at the moon. My mother pushed up the mirror too far and out of focus. Eventually we got it focussed. You could see the craters. With Dad out we looked at starfields invisible to eye.’

Moonshot

full moon

THE FULL MOON was sitting temptingly over the wood but at first I couldn’t get the settings right to photograph it with the 30x zoom on my new camera.

moon and cloudsFaced with so much dark sky the camera’s natural inclination is to go for an average exposure, making moonlit clouds visible but in the process making the moon look as bright as the sun. The camera went for a 5 second exposure so, even though I had it on a small tripod on my desk, there’s a lot of camera shake.

Manual Setting

Tycho
Detail of the crater Tycho, 1/800th second exposure

I set the mode dial, which so far has almost always been on ‘SR AUTO’ (scene recognition), to M for manual and went for the shortest exposure that I could select, 1/800th of a second.

I’m going to have to try again because this is underexposed but at least by tweaking the tonal levels in Photoshop I can bring out some of the details.

Camera Shake

Same image after adjusting the levels in Photoshop.
Same image after adjusting the levels in Photoshop.

To eliminate camera shake I set the auto timer to 2 seconds so that the camera had time to settle after the slight movement caused by my finger pressing the shutter button.

If I’d been drawing this full moon from memory I would have made it slightly yellowish but the camera’s auto white balance has shown it as almost pure grayscale, which is much nearer to its true, almost monochromatic, colours.

Mare Humorum

8 pm; A WAXING gibbous is hanging serenely above the wood so I set up my telescope on the desk and spend an hour drawing craters, mountains and maria, sketching the basics in pencil then picking out features in pen.

It’s the first time that I’ve used my telescope since I started wearing varifocals and I’m pleased that with the rubber eyepieces folded down I can manage reasonably well. I’ve never found it easy to draw using a telescope.

As always, most of the detail is near the terminator (the line between the sunlit and shaded halves of the Moon) but on the illuminated side the rays of the craters Copernicus and Tycho are prominent. These rays cross other – therefore older – features so Copernicus, at 93 kilometres in diameter, and Tycho, 85 kilometres, are relatively younger.

In the southwest quarter, Mare Nubium and Mare Humorum are the ‘Sea of Clouds’ and the ‘Sea of Moisture’ while Palus Epidemiarum is the ‘Marsh of Diseases’. That doesn’t sound like an appealing destination so it’s not surprising that Apollo 11 headed for Mare Tranquillitatis, the Sea of Tranquility diagonally opposite in the middle of the northeast quarter of the Moon.

On 20 July 1969 Neil Armstrong, who died at the weekend, set foot there, in what Buzz Aldrin called the ‘magnificent desolation’ of the southwest corner of the Sea of Tranquility.

Curiosity

Mount Sharp, 23 August 2012, image from NASA

Curiosity has just touched down on Mars and is sending back the best pictures yet of the red planet. The colour balance in this photograph has been tweaked so that we can see the natural colour as it would appear in earthly daylight. The disant boulder, a pinhead in the middle of the square is about the same size as the Curiosity rover. So there’s lots of geology to explore.

I’m looking forward to following Curiosity’s progress on the slopes of Mount Sharp.

Of course I’d volunteer if they ever needed an artist in residence on a Mars mission but if the choice was between one spectacular manned mission and half a dozen robotic explorers I’d prefer the latter. We’ve got so much to learn about the planet and so many different landscapes to visit.

Link; NASA’s Mars Science Laboratory

Turn Right after the Alps

WE’RE ON the Ryanair flight from Leeds to Corfu and, from a geographical point of view, the route is simple to follow. It’s not so much a case of turn right after the Alps, it’s more just drawing a diagonal across Europe from Leeds to the island, off the north-east corner of Greece.

As we take off, heading towards Amsterdam, England is swathed in cloud.

Low Countries

I don’t get a glimpse of the North Sea but as we reach what must be the Netherlands I can see field strips, waterways and flooded gravel pits through gaps in the cloud. The long thin fields are so different from the usual patchwork of English midlands fields. They radiate out like huge chevrons from a central point and I suspect the reason for this pattern is to allow for drainage, so the centre of the chevrons might represent a ridge of slightly higher ground in a landscape that is so close to being flat that no slopes are perceptable from up here at 3700 feet.

Unfortunately we soon run into cloud again. I try to take in the overall pattern of clouds in a quick pen and ink sketch. This serves as a diagram but I try pencil in an attempt to show the tones of the expanse of cloud that we fly over next.

Pencil never seems to work as I’d like it to!

But I’m soon peering down through gaps in the clouds again. It’s still a landscape of low fields and lagoons but now there are more wooded areas. White fields may be covered in cling-film, or perhaps it’s some unfamiliar crop that I don’t recognise.

Ridge and Valley

We fly over a wooded ridge, broken at regular intervals by small valleys. Where you’d expect there to be a fan of debris from each tributary valley’s stream there are a series of small settlements.

This reminds me of a pattern of settlements that you’d find in parts of England settled by the Anglo Saxons, some of whom might have migrated to our country from this part of the Europe after the collapse of Roman rule.

In places where there’s a ridge like this, the western edge of the Cotswolds is, I think, an example, you’ll get parishes laid out in this way. Each village is sited on an alluvial fan which keeps it above the level of regular flooding in the main valley, each village gets a fair share of different land; perhaps for pasture on the hill, woodland on the scarp slope and arable on the alluvium in the valley.

We’re soon above hillier country, flying over parts of Germany, I should think. Again the steeper slopes are picked out with strips of woodland. The valley here is filled with a town but not far away on the hill it still looks rural with villages and green pastures.

Woodlands become a major feature of the increasingly hilly landscape. Perhaps this is the Black Forest.

Alpine Panorama

There are frosty-looking blue green forests of conifers as we reach the Alps. After getting to know a small area, from the Top of Europe down to Interlaken, on our holiday in Switzerland last year it’s great to have the opportunity to see the mountain range from a wider perspective.

The higher peaks and valleys are entirely snow-covered and I spot a glacier flowing through a high valley, cracks appearing in its surface as it turns a corner in its valley.

It’s strange to think that we’re heading for a Mediterranean holiday and that we’ll be touching down in a very different landscape in about an hour.

As I wrote in my sketchbook, ‘there was a cloud-filled gap at the eastern end of the Alps, then a range of lower mountains, still snow-capped peak but with more forest on the slopes.’

We were probably flying over the Brenner Pass then reaching the Hohe Tauern or High Tauern mountain range of the Central Eastern Alps.

Gulf of Venice

Over the years a lot of sediment has been eroded from these mountains, cutting down to create the valleys and enlarge the passes. You can see some of the sediment in this braided river channel. I think this is the river Tagliamento, or possibly the Bóite, which lies a little to the east.

Rivers like these have over thousands, probably millions, of years built up the Italian lowlands around the Gulf of Venice. I couldn’t spot Venice itself but these two rivers (the Piave, top, and Bóite?) reach the sea to the east of Venice.

The Dalmatian Coast

There’s quite a contrast as we continue south-east, along the Dalmatian Coast of the Adriatic Sea. After all the earthy colours of northern Europe, the islands look as if they’ve been designed by a Manga cartoon illustrator. They’re set in a sea which is as blue as the sky above and they’re outlined by a sandy shoreline, rounded in cartoon style.

There’s a string of little islands. In each case the village is set around a bay, sometimes with a satellite island just offshore, offering additional shelter from the elements and, perhaps in historical times, keeping them out of sight of pirates and predatory naval powers.

Albania

The last time we were here this was the coast of Yugoslavia, now this Croatia but the final country that we fly along the coast of before we descend is Albania. An appropriate name for a country where snow caps limestone mountains.

We pass a river mouth which, as fare as I can tell from my atlas, is the Vijosë, an Albanian river.

There’s a plume of sediment which looks sandy where the river enters the sea and darker in colour, and deeper underwater, further out. This is probably finer, muddier sediment. To judge from the direction this sediment disgorges into the Adriatic Sea, the prevailing current is northwards on this coast.

Descending to Corfu

The northern end of Corfu lies only a couple of kilometres from the Albanian coast so I’m not sure exactly in my sketchbook where the mainland ends and island begins. I think that the vertical strata of limestone, fringed by wooded slopes are mountains at the north end of Corfu. The highest point, Mount Pantokrator, rises to 912 metres.

There are inlets and marinas on the north-east coast of Corfu. I think this (right) is Gouvia Bay.

Corfu is long and thin, like a mishapen boomerang, so we’re soon passing over the west coast where Chalikounas Beach separates Korisson Lake from the sea.

We turn around over the southern tip of the island, Cape Asprokavos to approach the airport from the south.

Benitses

It’s a short taxi ride along the coast road to get to our apartment near Benitses and after checking we go for a late lunch – moussaka, what else? – at one of the tavernas near the little harbour.

Later, sitting on the veranda at the back of our apartment, I draw the crags on the hillside, rising amongst the terraces of olives.

Those are a couple of tall cypresses at the top of the crag.

Blackthorn Winter

8.40 a.m. THIS MORNING’S snow, settling briefly on the Blackthorn blossom by the wood when I drew this, seems out of season after the weeks of dry, settled weather we’ve been had, recently with summer temperatures. Cold air is moving in from the continent as a couple of high pressure systems over the Atlantic weaken and retreat. At least that’s as I understand it from the Met Office sequence of maps that I’ve been looking at. Warm fronts (indicated on the map by a red line with semi-circles facing in the direction of travel) followed by cold fronts (indicated by a blue line with triangles) have been moving down across the country but today the map shows an occluded front (a purple line with alternate triangles and semi-circles) across southern England.

An occluded front occurs when a second mass of air moves in so quickly that it overtakes the first. If colder air is catching up with a warm front it will plough under it, wedging itself beneath the warmer air.

If warm air is forced upwards it’s going to cool, resulting in rain, and if the rain falls through the wedge of colder air, that would, I guess, turn it to snow.

Weather maps show the situation from above but to understand a swirling meeting of air masses like an occluded front, you’d really have to see it from the side or in three dimensions.

Occlude means to block, stop up or obstruct and in today’s case I think that would refer to the cold wedge of air swirling in and cutting off the warm air from the centre of the low pressure system, a cyclone, which in the northern hemisphere moves in an anti-clockwise direction when seen from above.

Towards the End of the Afternoon

I’M AWARE that the predominate colour scheme of my sketchbooks is brown and green, but mainly brownish, whether I’m drawing shells, fossils or assorted birds and animals, so, looking out of the window this afternoon at 4.15, instead of starting with the trees, I started with a patch of blue and instead of starting with my current favourite brown pen, I just started laying on the colour, propping my sketchbook on my glasses’ case so that the watercolour wash ran down the page.

A vapour trail in the east above the wood was illuminated by the near to setting sun while grey clouds were approaching from the south, filling most of my view by the time I finished my second sketch.