Stephen Sekula

https://mastodon.cooleysekula.net/@steve

Particle #Astrophysics researcher, #SNOLAB Research Group Manager, #Professor of #Physics at Queen's University. I live and work in #Sudbury, #Ontario, #Canada. I study #neutrinos and hunt for #darkmatter. I am an #author #coder #runner. 2025 Breakthrough Prize in Fundamental Physics co-laureate.  Banner image: one of Sudbury’s many beautiful lakes.

#fedi22

LATEST BOOK: https://darkmatterdiscoverer.org/
ALL BOOKS: https://steve.cooleysekula.net/books/
BLOG: https://steve.cooleysekula.net/blog
MEDIA: https://media.cooleysekula.net/a/sjsekula/video-channels

Public Key

npub1756aafg3a2sccf4rrz592lc4dppvv5ur6yvw7mxgmn9ngy8uxu4s5z0a2x

NIP-05 Address

[email protected]

Profile Code

nprofile1qqs02dw755g74gvvy63332z40u2ksskx2wpazx80dnydeje5zr7rw2cppamhxue69uhkummnw3ezumt0d5q3gamnwvaz7tmjv4kxz7fwv3sk6atn9e5k7x9q3yn

Publishing to

nostr.mom

relay.damus.io

nos.lol

Author Public Key

npub1756aafg3a2sccf4rrz592lc4dppvv5ur6yvw7mxgmn9ngy8uxu4s5z0a2x

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Published at

2026-11-10T13:51:29Z

Kind type

0 Metadata

Event JSON

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Last Notes

2026-08-28 04:17:39 GMT

A photo of the moon very near or at maximum #LunarEclipse tonight. It's really quite a thing to see the lunar surface bathed in the reddish wavelengths that penetrate through Earth's thin atmosphere and bend toward and onto the lunar surface. We become both shadowcaster and lens for this event.
#astronomy #Sudbury
https://mastodon.cooleysekula.net/system/media_attachments/files/117/171/194/137/078/876/original/c3f421dfa6679791.jpeg

2026-08-21 14:04:33 GMT

Check out my #collection of #astro-oriented people and organizations. Follow some of them today to learn a little more about #astronomy and #astrophysics, but also to help see scientists as people with lives and concerns.
https://mastodon.cooleysekula.net/collections/116847352039485746

2025-12-14 14:06:00 GMT

RE: https://masto.canadiancivil.com/@paige/115718239051943653
Echoing this critical advice, especially to #science organizations. If you are a science organization on Bluesky and you want to expand your audience to the open, federated social web, just follow this bridge account. Then I --- an open, federated scientist --- can find and follow you, and you can find and follow me.
#note1vjd…2mjp

2025-09-29 01:10:09 GMT

Bridging Science to the Fediverse
The "fediverse" is the term for the federated social web, a collection of social media concepts (Mastodon, PeerTube, Pixelfed, Friendica, Bookwyrm, etc.) that can all talk to each other by virtue of a common protocol: ActivityPub. The technical details don't matter. What matters is that, in the fediverse, everyone can have a home without paying tribute to a private company or sacrificing their content (or eyeballs) to somebody's…
https://steve.cooleysekula.net/blog/2025/09/28/bridging-science-to-the-fediverse/

2025-09-25 00:09:03 GMT

The haüyne has my vote in this round. I have a weakness for blue, though the allure of #MartianBlueberries hematite is strong...
The pictures seemed to be missing from the original post, so I attached pics of #hauyne and #hematite to this post.
Mineral Cup: "#MinCup25 Round 3 Match 1: Col…" - Haute Lune
https://mastodon.cooleysekula.net/@npub1ssg…swjk/115261997913666817
https://mastodon.cooleysekula.net/system/media_attachments/files/115/262/020/900/072/433/original/ae1b2f24e283e6bc.jpg
https://mastodon.cooleysekula.net/system/media_attachments/files/115/262/020/904/323/381/original/77209eaf7c2c6cf9.jpg

2025-09-07 21:07:40 GMT

Parts of the very top of the #Sudbury Superstack have begun coming down in the last few weeks. It will take a very long time to dismantle this structure, a mere 1ft short of the Empire State Building, but it is quite a thing to see the titan coming down piece by piece.
https://mastodon.cooleysekula.net/system/media_attachments/files/115/165/053/419/799/129/original/9c62aa254e0fd4dd.jpg

2025-05-12 11:53:50 GMT

Today is the day I begin my summertime midday runs at work. You cannot run on the mine site that hosts #SNOLAB, but there is a public area just at the edge of the main road and that is a good place to start a run.
Running is quality time with my brain and I have missed it.
#running #runner

2025-05-08 23:54:44 GMT

- reply

America appears to be caught in a terrible vice, squeezed between a tariff regime designed to crush the economy of the present and an anti-science regime designed to crush the economy of the future.
#damage #science

2025-05-08 23:52:52 GMT

- reply

"The agency is also expected to issue another round of notices tomorrow terminating grants that have already been awarded, sources say. In the past 3 weeks, the agency has pulled the plug on almost 1400 grants worth more than $1 billion."
The burning of the intellectual foundations of America's success continues.
#NSF #damage #science

2025-05-08 23:45:44 GMT

"According to sources who requested anonymity for fear of retribution, staff were told today that the agency’s 37 divisions—across all eight NSF directorates—are being abolished and the number of programs within those divisions will be drastically reduced. "
https://www.science.org/content/article/exclusive-nsf-faces-radical-shake-officials-abolish-its-37-divisions
The #damage to #science continues in the US.

2025-04-03 11:11:21 GMT

Canada’s U.S. brain gain is risky without foundational support for science (The Globe and Mail (Ontario Edition)), Apr 03, 2025
https://globe2go.pressreader.com/article/281994678306437
Another perspective in the #GlobeAndMail about how to bolster #Canada as a broad and potent scientific powerhouse.

2025-01-20 17:45:39 GMT

With a bunch of new folks likely coming into the fediverse in the coming days, it is time for a re- #introduction
I am a #Professor of #Physics at #QueensUniversity in Ontario, on secondment to #SNOLAB to serve as the Research Group Manager. SNOLAB is #Canada's deep underground science lab.
I am a #writer, mostly of non-fiction science books for general and specialized audiences.
I love federated social media. I love #teaching, #astronomy, #astrophysics, #DarkMatter, and #neutrinos.

2024-12-15 14:02:35 GMT

Huh. Quite a name to emphasize for a shipping group.
https://mastodon.cooleysekula.net/system/media_attachments/files/113/657/205/664/892/103/original/b6be802dd642f01d.jpg

2024-11-02 15:00:33 GMT

I am generally a non-fiction (co) #author of scientific books. I have 2 books for a general public audience (“Reality in the Shadows (or) What the Heck’s the Higgs?” and “The Friendly Physics Guide to Nuclear and Particle Physics in Modern Medicine Volume 1”).
Let’s focus on these for now! “Reality” is about how physics learns about the natural world and makes predictions, and “Nuke Med” is about how physics and medicine are inseparable.
https://steve.cooleysekula.net/books/
#FediBookFair #Science
https://mastodon.cooleysekula.net/system/media_attachments/files/113/413/952/550/298/311/original/98ee8cf5ea794664.jpeg
https://mastodon.cooleysekula.net/system/media_attachments/files/113/413/953/960/765/456/original/2d0b0374087ebf4a.jpeg

2024-10-14 13:26:44 GMT

Let’s help @npub1764…nuj0 gather some data for his publisher!
Would you like to see (with the intent to buy) a paper edition of his “ActivityPub” book?
https://evanp.me/2024/09/19/book-signing-party-30-sep-2024/