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Rob Thacker

@robthacker.bsky.social

Astrophysicist & photo geek✨Graduate Coordinator of astrophysics at SMU. Regular co-host of Science Files on CityNews Halifax and Science Wire on CFRA Ottawa. You are made of the ♥ of stars. Halifax/K'jipuktuk (he/him)

1,258 Followers  |  446 Following  |  839 Posts  |  Joined: 06.08.2023  |  2.1185

Latest posts by robthacker.bsky.social on Bluesky

Featherlike fronds of ice criss-cross on an ice-covered surface. The pattern is random and yet strangely organized.

Featherlike fronds of ice criss-cross on an ice-covered surface. The pattern is random and yet strangely organized.

It's that time of year. The feathery touch of winter is upon us. #photography #mikmaki

06.12.2025 00:12 — 👍 12    🔁 1    💬 0    📌 0

In full 2018 mode: Yassss!

01.12.2025 21:46 — 👍 2    🔁 0    💬 0    📌 0

I really wish bluesky served me more of your posts...

01.12.2025 21:39 — 👍 2    🔁 0    💬 1    📌 0
A series of round bicycle locking frames arcs to the left along a path. Each of the frames has an orange snow-plow warning stick attached to it that points directly upward.

A series of round bicycle locking frames arcs to the left along a path. Each of the frames has an orange snow-plow warning stick attached to it that points directly upward.

There's gotta be a ringette pun about this image! 😊On the @smuhalifax.bsky.social campus this morning. #Halisky

01.12.2025 17:58 — 👍 5    🔁 0    💬 0    📌 0

At the request of Canada Post, to avoid confusion with New Brunswick, in 1969 Nebraska agreed to change its shortening from NB to NE.

22.11.2025 22:28 — 👍 11    🔁 1    💬 1    📌 0

Marcus wept.

19.11.2025 22:59 — 👍 0    🔁 0    💬 0    📌 0

TY!

16.11.2025 21:09 — 👍 0    🔁 0    💬 0    📌 0

The source of bias in a probabilistic system lies in its construction, not in its use of probability.

¯\_(ツ)_/¯

AI can easily be biased. Please don't argue because it is probabilistic it isn't biased. That's just not true. With that logic you'll end up arguing a loaded die is fair.

16.11.2025 21:03 — 👍 5    🔁 0    💬 1    📌 0

ASL interpretation will be provided at the event #deaf

14.11.2025 18:02 — 👍 0    🔁 0    💬 0    📌 0
Preview
North Star Laurie Rousseau-Nepton is a young, Quebec-born Innu astrophysicist who’s leading a massive research project at the Canada-France-Hawaii Telescope. Drawing on a worldview rooted in a love of nature, …

Dr Rousseau-Nepton can also be seen in this Canada Film Board documentary: www.nfb.ca/series/north...

14.11.2025 18:01 — 👍 1    🔁 1    💬 1    📌 0
Preview
Dan MacLennan Memorial Lecture in Astronomy Solving the Universe: Past, Present and Future

Delighted to announce the 2025 Dan MacLennan Memorial Lecturer in Astronomy as Dr Laurie Rousseau-Nepton of the University of Toronto. Her talk (Fri Nov 21st 7pm) title is: Solving the Universe: Past, Present and Future. All ages welcome. Free event (with tix): www.eventbrite.ca/e/dan-maclen...

14.11.2025 18:00 — 👍 2    🔁 1    💬 1    📌 0
Panoramic view of an inlet, the waterline cuts across the middle of the image. On the right is a stand of trees with a red maple that reflects in the water. On the left many of the leaves have fallen, revealing structure in the woodland that is reflected in the water.

Panoramic view of an inlet, the waterline cuts across the middle of the image. On the right is a stand of trees with a red maple that reflects in the water. On the left many of the leaves have fallen, revealing structure in the woodland that is reflected in the water.

Looking out towards the centre of the lake, a single island is reflected in the water. Birches reach up to the sky and their reflection in the still water is equally strong. The distant shoreline presents a dark band across the horizon.

Looking out towards the centre of the lake, a single island is reflected in the water. Birches reach up to the sky and their reflection in the still water is equally strong. The distant shoreline presents a dark band across the horizon.

It's been a crazy fall with new course preparation on top of additional things like contract negotiations. But can't complain too much when you have amazing places like Shaw Wilderness just a few mins drive away. Here's a couple of fun little reflections. #photography #mikmaki

09.11.2025 20:51 — 👍 20    🔁 1    💬 0    📌 0
A view of two cedar planters, each with the surface covered in straw. The new planter is on the left and the cedar is still it's new warm colour. The older planter on the right is going grey having weathered through many seasons.

A view of two cedar planters, each with the surface covered in straw. The new planter is on the left and the cedar is still it's new warm colour. The older planter on the right is going grey having weathered through many seasons.

I'm not sure if getting chores done counts as procrastinating on work work 😅but got a new garlic bed assembled today and @lmcampbell.bsky.social got our next crop of garlic planted. Shout out to allthingscedar.ca for their cedar planters (yes could do it cheaper with pine or by hand, no time!)

19.10.2025 17:36 — 👍 5    🔁 0    💬 0    📌 0
Yellow branches of ginko leaves reach out beyond a bright red maple in the background. In the top left of the image some green oak leaves fill the corner.

Yellow branches of ginko leaves reach out beyond a bright red maple in the background. In the top left of the image some green oak leaves fill the corner.

Have to admit this was a pretty awesome combination of the fall colours. The reds are so vivid this year! The yellow is a ginko, the red is a maple behind it, while the tree that is still green is an oak. #halifax #photography

16.10.2025 19:06 — 👍 34    🔁 2    💬 0    📌 0
The flowers that were previously buds are now completely open. Two new leaves are also growing.

The flowers that were previously buds are now completely open. Two new leaves are also growing.

And a few days later in full bloom. With the temperature reaching 26 C today this feels rather apropos...

06.10.2025 17:14 — 👍 6    🔁 0    💬 0    📌 0
View of some maple leaves isolated against a dark green background. The maples leaves are a mixture of green and beautiful dark reds.

View of some maple leaves isolated against a dark green background. The maples leaves are a mixture of green and beautiful dark reds.

A single delicate young tree grows in the shade, surrounded by much larger and older pines. It's leaves are yellowing and a single branch reaches up towards the light.

A single delicate young tree grows in the shade, surrounded by much larger and older pines. It's leaves are yellowing and a single branch reaches up towards the light.

Close-up of a single maple leaf. Down the centre-line of the leaf the red only exists on the right hand side, the left is green. A small dab of red also exist on the farthest most right part of the leaf.

Close-up of a single maple leaf. Down the centre-line of the leaf the red only exists on the right hand side, the left is green. A small dab of red also exist on the farthest most right part of the leaf.

Looking through the shade of the canopy towards leaves in the light. A single hemlock stands in the middle, it's foliage reaching out to the edge of the image, while behind are maple leaves, a combination of oranges and red.

Looking through the shade of the canopy towards leaves in the light. A single hemlock stands in the middle, it's foliage reaching out to the edge of the image, while behind are maple leaves, a combination of oranges and red.

As the northern hemisphere feels the first few portents of winter coming, got out to #Oakfieldprovpark this afternoon for the first time in ages. Such a beautiful place, the colours are vibrant already & will likely be stronger in a few days. Here are a few small vignettes. #photography #mikmaki

05.10.2025 19:39 — 👍 5    🔁 0    💬 0    📌 0
Six flowers protrude out of a bud, with one flower opened to reveal white petals of the callery pear flower. Two of the ornamental pears hang beneath the bud cluster. Twigs and a wall of blue fill the background.

Six flowers protrude out of a bud, with one flower opened to reveal white petals of the callery pear flower. Two of the ornamental pears hang beneath the bud cluster. Twigs and a wall of blue fill the background.

Here's a callery pear on the SMU campus blooming in late September. I had a minor freak out on seeing this, but apparently the trees will do this after periods of stress, most notably drought. It's only a couple of blooms as well, most of the rest of the buds are dormant.

29.09.2025 12:25 — 👍 15    🔁 0    💬 1    📌 0
The sun rises over distant mountains giving a yellow cast to the sky that peeps through the hard blue cloud cover. Sea mist is lit bright red by the off-axis sun, while waves beach towards the viewer.

The sun rises over distant mountains giving a yellow cast to the sky that peeps through the hard blue cloud cover. Sea mist is lit bright red by the off-axis sun, while waves beach towards the viewer.

A truly spectacular morning at Mellon Udrigle beach in the scottish #highlands. It really is pretty pretty amazing to see the sun rise over the mountains to the east, in turn lighting up the sea mist. #photography

31.08.2025 20:53 — 👍 23    🔁 0    💬 0    📌 0

Thanks to all bluesky friends that chuckled at the #joke.

24.08.2025 20:47 — 👍 1    🔁 1    💬 0    📌 0
A tractor drives down and across a brown field. Throughout the field are gulls, following the newly turned soil.

A tractor drives down and across a brown field. Throughout the field are gulls, following the newly turned soil.

Here's a farmer sowing gulls 😉They grow very quickly and are quite mobile. #photography

24.08.2025 20:24 — 👍 31    🔁 0    💬 2    📌 0
A break in the cloud ripples across the sky. Shafts of sunlight beam through the break in the cloud lighting up the landscape.

A break in the cloud ripples across the sky. Shafts of sunlight beam through the break in the cloud lighting up the landscape.

Treated to a truly amazing sky this morning. Clouds were breaking up and letting shafts of light through. #photography

20.08.2025 15:39 — 👍 33    🔁 1    💬 1    📌 0

It's 8:15, and that's the time that it's always been.

10.08.2025 22:16 — 👍 3    🔁 0    💬 0    📌 0
A hummingbord that is mostly green hovers between sprays of bright red crocosmia flowers.

A hummingbord that is mostly green hovers between sprays of bright red crocosmia flowers.

A hummingbird rests on a metal cage looking towards the photographer intently. In the background is foliage.

A hummingbird rests on a metal cage looking towards the photographer intently. In the background is foliage.

And here we go - ruby-throated hummingbirds feeding on the crocosmia as well as landing on the tomato cages and giving us a stare down! 😀Little bit windy tonight so they weren't able to hover for long periods in the same place...

20.07.2025 22:52 — 👍 8    🔁 0    💬 0    📌 1
Several sprays of bright red crocosmia hang down together. The flowers are in pairs along a stem, with the tips yet to bloom.

Several sprays of bright red crocosmia hang down together. The flowers are in pairs along a stem, with the tips yet to bloom.

A single purple-headed bee-balm rises up from it's stem. Grass is in the background framing the flower.

A single purple-headed bee-balm rises up from it's stem. Grass is in the background framing the flower.

Crokey-bees 😉 An awesome #crocosmia spray alongside some bee-balm in the garden. As always @lmcampbell.bsky.social is doing a fantastic job of shepherding everything to bloom. Will see if we can get some hummingbird pics tonight. #photography #bloomscrolling

20.07.2025 15:55 — 👍 6    🔁 1    💬 0    📌 1
Looking towards a tree in front of a road. Three fawns are in the foreground while the doe is half-hidden by the tree in the centre of the image.

Looking towards a tree in front of a road. Three fawns are in the foreground while the doe is half-hidden by the tree in the centre of the image.

Doe with three fawns walking around the neighbourhood tonight (quick phone pic). They weren't even remotely scared of me watering the garden. Not good in that it means ticks are going to be spread around peoples' gardens. halisky

13.07.2025 23:55 — 👍 12    🔁 0    💬 0    📌 0

Last year we had 241 Growing Degree Days (10 C) by the end of June, this year it is only 224. It might still be a very warm July/Aug (that's been predicted) but to this point the growing season is behind last year.

11.07.2025 01:39 — 👍 1    🔁 0    💬 1    📌 0
A spray of bright red crocosmia flowers. The flowers themselves come in pairs along the stalk. The first flowers are open, while those toward the tip or the spray are still closed, showing red and yellow/green colours. In the background is green foliage.

A spray of bright red crocosmia flowers. The flowers themselves come in pairs along the stalk. The first flowers are open, while those toward the tip or the spray are still closed, showing red and yellow/green colours. In the background is green foliage.

With it being a colder summer, blooms in our garden are about 4-6 days behind '24. However, the first strands of #crocosmia are out! We jokingly call it "hummingbird crack" as they will get pollen on their heads while feeding. @lmcampbell.bsky.social has seen one flit by so far. #bloomscrolling

11.07.2025 00:52 — 👍 8    🔁 0    💬 1    📌 0
A cluster of five dogwood flowers forms a cross, updown and across. Behind are leaves supporting the flowers, while vegetation is in the background. The petals each have a point at their tip. The image is black and white.

A cluster of five dogwood flowers forms a cross, updown and across. Behind are leaves supporting the flowers, while vegetation is in the background. The petals each have a point at their tip. The image is black and white.

A cute little dogwood spray on the SMU campus. It's pretty difficult to reproduce the delicate structure on the white petals, but doing the best I can with a phone cam. #photography

01.07.2025 15:46 — 👍 10    🔁 0    💬 0    📌 0
Preview
Several US Jolly rancher sweets unsafe to eat, FSA says The FSA says chemical compounds in the sweets can increase the risk of cancer and damage DNA.

I guess you call them the "Not so Jolly Rancher" sweets...

From article: "The FSA is advising people who have any of the listed products to not eat them and dispose of them at home."

More details: www.bbc.com/news/article...

13.06.2025 19:30 — 👍 0    🔁 0    💬 0    📌 0

Thanks. Yes, I've been making the point about the conflict between AI power requirements vs moving toward Net Zero 4 a while. The fact that GDP isn't taking off suggests to me AI is destroying as much value as it is creating. Which makes everything a race to the bottom with a big environmental cost.

11.06.2025 19:30 — 👍 0    🔁 0    💬 0    📌 0

@robthacker is following 20 prominent accounts