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Andy Casely @deep-twilight.bsky.social · 19h

Saturn, 10th October Peak Saturn season - this just a a few days past Saturn's 2026 opposition, with a couple of subtle changes in shadows from previous images. Seeing wasn't so great, it's a bit soft, but three inner moons of Saturn are in view - Mimas, Tethys and Enceladus. C14, ASI462MC, 22mins

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Andy Casely @deep-twilight.bsky.social · 16/10/2026

Saturn and five moons in IR, 30th September A reasonable infrared image of Saturn with (l-r) Dione, Enceladus, Titan, Rhea and Tethys nearby. A couple of ring spokes are on the left ansa of the B Ring. Celestron C14, ZWO ASI585MM, 23mins.

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Andy Casely @deep-twilight.bsky.social · 14/10/2026

Saturn, 29th September With rings brightening a week before opposition, and a couple of ring spokes in view on the right ansa. Mimas is faint, close to the rings. There's quite a large storm on the equator too, just above the brightest yellow area.

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Andy Casely @deep-twilight.bsky.social · 14/10/2026

Moth transits! I've been loving the Bogong moth resurgence in 2026, took a chance to capture a few of the many, many moths around Sydney passing in front of the Sun, like furry space stations! ASI585MM @90fps, 100-400mm lens at 300mm, focus shifted slightly between Sun and transiting moths.

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Andy Casely @deep-twilight.bsky.social · 17/08/2026

A cloudy total eclipse from Hellisandur Well, changing lenses with 8min to go as clouds thinned a bit was *not* recommended (eek!), but it was so exciting, a spectacular, almost spiritual view through thinner clouds for totality in Iceland. EOS6Dii @ 400mm. #totaleclipse #icelandeclipse

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Andy Casely @deep-twilight.bsky.social · 31/07/2026

Saturn, Rhea and spokes 6th July RGB image from a nice session a few weeks ago, some strong ring spokes are on the near-right side on the B-ring. There's a nice storm in the southern mid-latitudes, south is up. Rhea is to the left. Celestron C14, ZWO ASI585MM, 22mins, taken from the Blue Mountains.

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Andy Casely @deep-twilight.bsky.social · 16/05/2026

The polar hexagon shows even better in a polar projection on WinJupos, where you can see the polar vortex at the centre, and the very distinctive hexagon surrounding the south pole. Various features of the big 2018 storm show up well. (2/3)

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Andy Casely @deep-twilight.bsky.social · 16/05/2026

A reprocess from the archives - Saturn in June 2018 in excellent conditions, rings tilted well towards us, showing off a substantial polar storm, as well as good definition of four sides of Saturn's polar hexagon. 1/3

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Andy Casely @deep-twilight.bsky.social · 28/04/2026

Homunculus Nebula expansion - 2008-2026. A sequence of three images, comparing my backyard C14 image with the two HST images (2008 and 2019). The nebula expands from 17" to 21" in diameter and details such as the hole in the 'near' bubble end and jet-like equatorial blasts consistently grow outwards

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Andy Casely @deep-twilight.bsky.social · 27/04/2026

Homunculus Nebula in colour Well this came out better than I thought... Captured on Saturday in perfect seeing. Texture in the bubbles, faint outer details, all consistent with HST and Damian Peach's 2017 1m telescope shot. No funky/AI tools here. Maybe the sharpest amateur image of this one?

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Andy Casely @deep-twilight.bsky.social · 18/03/2026

As forecast it was a bust from Sydney, solid grey clouds and showers all day, night & week (photo from the office). 😢 Classic astronomy event weather!

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Andy Casely @deep-twilight.bsky.social · 13/03/2026

I'm just south of the path, but the cloud cover forecast (though still 6 days out) is not at all promising for the east coast - easterly winds and extensive cloud. Fingers crossed it improves...

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Andy Casely @deep-twilight.bsky.social · 25/09/2025

Three galaxies, aurora, mountains and clouds A timelapse from a recent trip to Glenorchy, NZ - beautiful dark skies and plenty to look at, with clouds bubbling off the Humboldt Range, broken enough to see the southern lights below the Milky Way and Magellanic Clouds. EOS6Dii, 228 frames, 20s each

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Andy Casely @deep-twilight.bsky.social · 24/09/2025

Two comets and Mars, 21st Sept C/2025 R2 (SWAN) is keeping pace with Mars, and fainter C/2025 K1 (ATLAS) is descending towards the Sun. Processing was interesting, correcting for three moving objects against the twilight starfield. Tonight, the Moon joins the party! EOS 6Dii, 35x1min, 300mm @ f/5.

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Andy Casely @deep-twilight.bsky.social · 13/09/2025

A Galactic frame of reference What's your point of view? Does the Milky Way set, or does the Earth just get in the way? Been wanting to do this one for a while! ~6hrs, 30s per frame, EOS6Dii, Star Adventurer, Sigma 14-24mm. Processed in PixInsight & PS. #astrophotography #timelapse

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Andy Casely @deep-twilight.bsky.social · 10/09/2025

Waxing Moon, 3rd Sept I was playing with camera focus and focal length points on the C14 - 585MM + focal reducer = 7 panel whole Moon mosaic, The full-size processed image is 90 megapixels. Hello, nearest neighbour! Full res view here: photos.app.goo.gl/J5pR2DJYiwrq...

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Andy Casely @deep-twilight.bsky.social · 30/08/2025

A dusty MIlky Way snap from a short break at Turon Gates, NSW. 29x90s, EOS 6Dii @24mm, Star Adventurer, good skies. Antares region is below centre. #astronomy #astrophotography

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Andy Casely @deep-twilight.bsky.social · 12/06/2025

You have been kidnapped and a character from the last tv show you watched is trying to rescue you. Who is coming to save you? Chances of survival... slim

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Andy Casely @deep-twilight.bsky.social · 26/05/2025

Dust storm this morning, everything a bit hazy. Our periodic reminder there's a lot of desert away out west!

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Andy Casely @deep-twilight.bsky.social · 09/05/2025

Sunrise on Saturn's rings 3 images 3rd-8th May (UT) - rings reappearing through Saturn's equinox on the 6th. First image shows the Sun/Earth-facing outer edge only, likely basically the F ring! (brightest equinox ring in Cassini 2009 data) Last image has south face of the rings illuminated again.

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Andy Casely @deep-twilight.bsky.social · 05/05/2025

Hidden rings, 3rd May You can see the rings in a longer-exposed, very heavily-stretched view! The ghostly rings are so faint just now that they are far outshone by 13.5mag Mimas (the fainter of the pair of moons on the left ansa). C14, ASI585MM, 6mins IR642nm. Sunrise on the rings is tomorrow...

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Andy Casely @deep-twilight.bsky.social · 05/05/2025

Saturn, five moons, no rings What a strange planet! Tomorrow is Saturn's equinox, a rare good look without its famous ring system, far too faint to see in a normally-exposed image, silhouetted against Saturn. Dione, Rhea, Mimas, Tethys and Enceladus too. C14, ASI585MM, 15mins, 3rd May 19:54UT.

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Andy Casely @deep-twilight.bsky.social · 03/05/2025

Saturn's hidden rings, 2nd May A snap of the dark side of Saturn's rings, only four days before Saturn's equinox. The silhouette of darkened rings cuts across the planet, and the full extent of the very faint rings themselves are in an overexposed and strongly stretched version. #astrophotography

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Andy Casely @deep-twilight.bsky.social · 14/04/2025

A cloudy crescent Venus on the morning of 13th April, lovely big thin crescent with the long horns from this hellish cloudy planet's atmosphere. Taken just after sunrise in good seeing. Celestron C14, QHY5III200M, 10mins data.

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Andy Casely @deep-twilight.bsky.social · 13/04/2025

Ghosts of Saturn's Rings Exploring Saturn's rare 'dark side', when the rings are pointed away from the Sun, but towards Earth, and extremely faint! Low in the morning sky, the rings are a dark band across the planet and barely visible in a stretched view. A ringless Saturn is fun! #astrophotography

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Andy Casely @deep-twilight.bsky.social · 27/03/2025

Plasma trees Another little Sun set from last week, a couple of bright prominences, one on the limb, one a bit beyond the limb pouring material sideways. Both gone within 24 hours, even though they looked very stable. 50 minutes, 66 frames timelapse, Evostar 100, Quark CS, ASI174MM #astrophotography

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Andy Casely @deep-twilight.bsky.social · 27/03/2025

Leap to (from) the stars! 80-min timelapse 15th March, a bright prominence detaching and accelerating to escape the Sun at up to 170km/s, 250,000km high by the end. I had to re-frame it as it got higher. 96 frames, 15s video per frame. Evostar 100, Quark CS, ASI174MM. #astrophotography

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Andy Casely @deep-twilight.bsky.social · 18/03/2025

In a vain attempt at a feed palate-cleanse, here's a Sun shot Sun from Saturday. I took a 100-frame timelapse of a big detaching prominence, this frame caught my eye - faerie, angelic, Icarus perhaps? Headless, in any case! Timelapse to follow. Enjoy 😊☀️ #astrophotography #solarsystem #solarmaximum

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Andy Casely @deep-twilight.bsky.social · 06/02/2025

Or a cricket pitch heavy roller?

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Andy Casely @deep-twilight.bsky.social · 30/01/2025

Yes, that looks like the first outbreak rotating into view, you can check the longitude for that date using the following maps, expertly made by Shinji Mizumoto and usually available at the following link: alpo-j.sakura.ne.jp/Latest/j_Cyl...

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Andy Casely @deep-twilight.bsky.social · 25/01/2025

Mars, 21st Jan Likely to be my opposition 'portrait' for 2025 - Mars at a v low opposition in Gemini, barely over our roof. Quite fuzzy even in decent seeing. The Valles Marineris is to the lower right, some blue limb clouds, but no sign of Olympus Mons or Tharsis volcanoes. #astrophotography #mars

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Andy Casely @deep-twilight.bsky.social · 21/01/2025

With all the shit news around, it's hard to focus on nice things and positive science rn. But here is Jupiter in infrared and methane band filters last night. The new NTBs outbreak is just setting on the upper-right limb. Nice seeing for the low altitude too. #Jupiter #astrophotography

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Andy Casely @deep-twilight.bsky.social · 15/01/2025

Comet C/2024 G3 (ATLAS) at high noon! A lunchtime comet chase of a rare "daytime comet" 100mm scope and DSLR, 5x 1/100s, 8deg from the Sun, garage door protecting optics, Sun almost overhead. Maybe near venus-bright, ~3arcmin tail. Nearest thing I've ever imaged to the Sun...

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Andy Casely @deep-twilight.bsky.social · 13/01/2025

Most satisfying was making maps of the events, including this one from four images taken across five hous on 15th Sept 2020 later in the outbreak when three outbreaks and their turbulent tails wrapped all around the planet. Happy imaging the new outbreak, everyone! 4/4

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Andy Casely @deep-twilight.bsky.social · 13/01/2025

I took dozens of images during the last outbreak, a period of good seeing gave me my first APOD image (colour) showing the development of the 'tail' of the first storm while the Red Spot and Oval BA passed each other. An APY image (methane) had a sequence of the activity #3/4

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Andy Casely @deep-twilight.bsky.social · 13/01/2025

For amateur #astrophotography it's a great time to image Jupiter, as the storms are bright in both visible and methane-band images, and there are likely to be new outbreaks in coming weeks as the first develops. I got the first image of outbreak 3 in 2020, lucky to catch it as it barely appeared 2/4

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Andy Casely @deep-twilight.bsky.social · 31/12/2024

Jupiter, 28th Dec A long time since I took your picture, old friend! Harder to image in 2024-25 from here (near Sydney)- the planet is low; summer evenings have heat shimmer in the air. But some Jovian photons for you! Oval BA is past the meridian, methane band shows high clouds. #astrophotography

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Andy Casely @deep-twilight.bsky.social · 18/12/2024

Jupiter reached opposition this month and I've had no chance to image my favourite planet... so here's a sharp one from 2019's image archives - can you spot Europa playing hide-and-seek? C14, ASI290MM, 14mins. #astrophotography

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Andy Casely @deep-twilight.bsky.social · 09/12/2024

While travelling in Iceland, it was Jupiter's opposition this week. A fruitless and cloudy aurora tour, but a very scenic night trip in Þingvellir National Park, with the big planet the (only) celestial star of the show!

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Andy Casely @deep-twilight.bsky.social · 25/11/2024

A solar dragon, 22nd November On a relatively benign day, just occasionally you can glimpse the creatures responsible for the Sun's activity 🐉 AR13901 with some spots, small flaring and curved filaments. More artistic than my usual processing. Evostsr 100, Quark CS, ZWO ASI174MM, 20s.

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Andy Casely @deep-twilight.bsky.social · 25/11/2024

A timelapse of the approach and landing at Singapore Changi a couple of days ago, through tropical clouds, across islands, mangroves, cargo ship anchorages and past the city. Timelapse at 30x speed, Galaxy S21. #timelapse

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Andy Casely @deep-twilight.bsky.social · 24/11/2024

One from the archives- a busy stormy Jupiter day in August 2020: a large outbreak in the North Temperate Belt, plus the Great Red Spot and Oval BA passing each other. Io and Ganymede are the moons. It was a part of an APOD image too. #astrophotography #astronomy

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Andy Casely @deep-twilight.bsky.social · 21/11/2024

The VIC-20 for me, followed by a long-loved Commodore 64 when I was very young.

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Andy Casely @deep-twilight.bsky.social · 18/11/2024

Here's a pic from the recent archives, C/2023 A3 Tsuchinshan-ATLAS, looking across fields near The Dish at Parkes on 28th Sept. A very pretty sight visually and with the camera, 55 minutes before sunrise, 5.5° tail. EOS 6Dii @100mm, 9x10s. #astrophotography

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Andy Casely @deep-twilight.bsky.social · 17/11/2024

Clouds gathering at Drummoyne (and not just for the Thunder 😔). But at great atmosphere with the Chamari Bay band! #wbbl #wbbl10

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Andy Casely @deep-twilight.bsky.social · 17/11/2024

And my #spotoftheday was a beautiful jewel beetle, Stigmodera maculata, hanging out on some manuka flowers near Lawson in the Blue Mountains. #trailrunning #naturephotography

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Andy Casely @deep-twilight.bsky.social · 17/11/2024

Cicadas ramping up in the Blue Mountains at Lawson, a 7-yearly mass emergence of Green Grocer cicadas, sound of trail running in summer! Some surprisingly informative connections between prime numbers & cicada/wildlife breeding: theconversation.com/prime-time-f... #bluemountains #trailrunning

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Andy Casely @deep-twilight.bsky.social · 16/11/2024

I may get excited by random weather and random sports, such as the #wbbl here in Australia, where the Thunder are topping the table ⚡️💚 I am open to suggestions as to how soon it is appropriate to post macro photos of our lovely Aussie garden spiders 🤣😱🕷

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Andy Casely @deep-twilight.bsky.social · 16/11/2024

Hey BSky, I've finally set up here after leaving twits a while ago. I'll post some solar system and astrophotos and connect in a nicer social community 😊 For intro, here are some images that were successful in astrophoto comps this year (Greenwich APY and David Malin Awards). #astrophotography

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