markmccaughrean, to Netherlands
@markmccaughrean@mastodon.social avatar

Looking through my DSLR photos from last night, it's clear I was more interested in watching the aurora than photographing it 😬

And I thought about binning this shot for being massively out-of-focus 🙄

But y'know, it has a certain colourful charm, not least because Ursa Major is writ large in the corner, & maybe it's fine to just go with the flow 🤷‍♂️

Enjoy 🙂

#Aurora #AuroraBorealis #NorthernLights #SpaceWeather #Wassenaar #Netherlands #Photography

markmccaughrean, to Netherlands
@markmccaughrean@mastodon.social avatar

Luminosity 🙇‍♂️

Freshly-emerged soft green leaves on the beech tree in the garden, backlit by the Sun.

(Yes, the same Sun that made a violent mess of the sky last night 🤷‍♂️)

#Wassenaar
#Netherlands 🇳🇱
#Photography 📷

markmccaughrean, to Netherlands
@markmccaughrean@mastodon.social avatar

Not bad; not bad at all 🙂

Especially for 52°N 🤷‍♂️



🇳🇱
📷
🚀☁️

markmccaughrean, to Netherlands
@markmccaughrean@mastodon.social avatar

I had a feeling that I’d see my first of the year today & I was right 🙂

A new species for me too – a male hairy hawker (Brachytron pratense) sunbathing in the grass 😻

Initially similar to other hawkers, like the migrant (Aeshna mixta) which I see a lot of, the hairy hawker flies much earlier in the year & is, well, hairy 🤷‍♂️🙂

Anyone know what the pink blob is under the anal appendages?

🐉🪰

🇳🇱
📷
🐜

reinoudk, to Netherlands Dutch
@reinoudk@mastodon.nl avatar
markmccaughrean, to Netherlands
@markmccaughrean@mastodon.social avatar

Morning.

A front moving from the south & promising heavy rain in about four hours brings some high clouds in too, making a nice 22° ice halo for a few minutes.

Need to get my cycle ride in before the rain comes, I think 😬🤞

#CyclingLife 🚴‍♂️
#Wassenaar 🚀 (if you know, you know)
#Netherlands 🇳🇱
#Photography 📷
#AtmosphericOptics 🌈
#CloudAppreciationSociety ☁️

markmccaughrean, to Netherlands
@markmccaughrean@mastodon.social avatar

“Where the clouds are made of candy floss”
– Jacky, “White Horses”, 1968

Somehow this song & the associated Yugoslav-German TV series came to mind from my early childhood as the sky was filled with mares’ tails this morning 🙂🤷‍♂️

#YesIAmThatOld 👴
#Wassenaar
#Netherlands 🇳🇱
#Photography 📷
#CloudAppreciationSociety ☁️

markmccaughrean, (edited ) to Astronomy
@markmccaughrean@mastodon.social avatar

There is a particular small bush in our back garden, next to the patio 🌳

If you stand beside it and look up at the gable peak of our house, there’s a star there ⭐️

Always.

All year round, day and night, whether you can see it or not 👀

It pleases me no end to know that 🙂🤷‍♂️

#Polaris #NorthStar #Astronomy #Astrodon
#Photography #Netherlands #Wassenaar

markmccaughrean, to Netherlands
@markmccaughrean@mastodon.social avatar

Another sunny day & another winter-surviving butterfly emerges from hibernation.

Today’s is a comma (Polygonia c-album), probably a male.

🦋

🇳🇱
📷
🐜

markmccaughrean, (edited ) to Netherlands
@markmccaughrean@mastodon.social avatar

A day ahead of the equinox & spring has truly sprung in our garden this lunchtime 🌿

Sunny, if not particularly warm, but enough to tempt one of last year’s peacock (Aglais io) out of hibernation ahead of egg laying.

There was a yellow one fluttering around too, probably a brimstone (Gonepteryx rhamni)🦋


🇳🇱
📷
🐜

markmccaughrean, to Netherlands
@markmccaughrean@mastodon.social avatar

Apologies for posting endlessly on this topic, but , here's another shot of the beautiful circumzenithal arc that graced the icy skies above our house yesterday.

This one was taken with my DSLR rather than my phone, so arguably better quality & thus worth uploading.






markmccaughrean, to Netherlands
@markmccaughrean@mastodon.social avatar

And here's another view of this afternoon's circumzenithal arc, which is formed by flat, oriented hexagonal ice crystals.

Although fainter than in the picture I posted earlier, the arc subtends over 90º here, which is pretty large.

https://old.atoptics.co.uk/halo/cza.htm






markmccaughrean, to Netherlands
@markmccaughrean@mastodon.social avatar

Here's that "mystery" ice halo from earlier today, soon after the circumzenithal arc disappeared – a short, colourful arc WNW of the Sun & concave to it.

I've measured it carefully using a later image of a sundog to calibrate the camera FOV) & it is 50º from the Sun.

That very likely means it's a fragment of a supralateral arc, formed in hexagonal ice columns.

https://old.atoptics.co.uk/halo/supinf.htm






An annotated version of the image of a partly cloudy sky seen over our garden this afternoon, with high cirrus ice clouds & some contrails running from bottom right to top right. The Sun is in the lower-left corner & there is a short rainbow-like ice halo visible towards the centre right. There are circles centred on the Sun from 5 degrees to 70 degrees, with the supralateral arc also marked.

markmccaughrean, to Netherlands
@markmccaughrean@mastodon.social avatar

Always unexpected 😱 always breathtaking 🥰

A beautiful circumzenithal arc graced the cirrusy skies over our back garden this afternoon, perhaps one of the best I’ve ever seen.

Often called an “upside rainbow”, you need to look high in the sky to see it – many people miss them on the rare occasions they appear.






reinoudk, to Netherlands
@reinoudk@mastodon.nl avatar
markmccaughrean, to Netherlands
@markmccaughrean@mastodon.social avatar

Well, it’s a start 🤷‍♂️☃️

#Wassenaar
#Netherlands
#ItsSnowTime

markmccaughrean, to Netherlands
@markmccaughrean@mastodon.social avatar

Unreliable cycling weather 😬✌️

#Wassenaar
#Netherlands 🇳🇱
#Photography 📷
#CloudAppreciationSociety 🌦️

markmccaughrean, to Netherlands
@markmccaughrean@mastodon.social avatar

Haven’t been posting much this week, as I’ve been burning the midnight oil working on another batch of #JWST data 🖥️😮‍💨

Here’s the Moon at 3am last night 🌕

Expect some very differently illuminated, coloured, textured, & scaled clouds of interstellar material next week 🙂👍

#Wassenaar
#Netherlands 🇳🇱
#Photography 📷

markmccaughrean, (edited ) to photography
@markmccaughrean@mastodon.social avatar

Ah ha, one of my favourite garden friends paid a visit today: a hummingbird hawk-moth (Macroglossum stellatarum) doing its best to illustrate the principles of convergent evolution 🙂

This is a 240fps slow-motion video: in real-time, it was flitting around like crazy, very briefly supping from each flower with its long probocis. Am happy the phone stayed in focus most of the time.






IngridHbn, to random Dutch
@IngridHbn@mastodon.online avatar
arkadiusz, to art
markmccaughrean, to photography
@markmccaughrean@mastodon.social avatar
markmccaughrean, to photography
@markmccaughrean@mastodon.social avatar

Eine kleine Nachtmusik.

The crescent Moon & Venus sailing together through the dusk skies over my back garden this evening.

#Photography #Astrodon #Wassenaar #Netherlands

markmccaughrean, to photography
@markmccaughrean@mastodon.social avatar

Today's garden macro: a quick shot of one of the tiny mint moths (Pyrausta aurata) that flit around at low-level all day long.

#BackGardenEntomology #MacroPhotography #Photography #Wassenaar #Netherlands

markmccaughrean, to photography
@markmccaughrean@mastodon.social avatar

A somewhat graphic design take for today's macro shot 🙂

A male azure damselfly (Coenagrion puella) perched on a piece of garden furniture, casting some nice shadows in the evening sun 🌞

#BackGardenEntomology #Odonata #MacroPhotography #Photography #Wassenaar #Netherlands

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