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The tiniest yet real telescope I've built

https://lucassifoni.info/blog/miniscope-tiny-telescope/
54•chantepierre•1h ago•15 comments

GPT-5.2

https://openai.com/index/introducing-gpt-5-2/
974•atgctg•15h ago•825 comments

Nokia N900 Necromancy

https://yaky.dev/2025-12-11-nokia-n900-necromancy/
277•yaky•9h ago•82 comments

He set out to walk around the world. After 27 years, his quest is nearly over

https://www.washingtonpost.com/lifestyle/2025/12/05/karl-bushby-walk-around-world/
100•wallflower•4d ago•38 comments

Google de-indexed Bear Blog and I don't know why

https://journal.james-zhan.com/google-de-indexed-my-entire-bear-blog-and-i-dont-know-why/
138•nafnlj•8h ago•43 comments

CRISPR fungus: Protein-packed, sustainable, and tastes like meat

https://www.isaaa.org/kc/cropbiotechupdate/article/default.asp?ID=21607
126•rguiscard•8h ago•66 comments

Guarding My Git Forge Against AI Scrapers

https://vulpinecitrus.info/blog/guarding-git-forge-ai-scrapers/
12•todsacerdoti•1h ago•2 comments

Rivian Unveils Custom Silicon, R2 Lidar Roadmap, and Universal Hands Free

https://riviantrackr.com/news/rivian-unveils-custom-silicon-r2-lidar-roadmap-universal-hands-free...
309•doctoboggan•15h ago•392 comments

The highest quality codebase

https://gricha.dev/blog/the-highest-quality-codebase
525•Gricha•3d ago•337 comments

Programmers and software developers lost the plot on naming their tools

https://larr.net/p/namings.html
275•todsacerdoti•15h ago•377 comments

An SVG is all you need

https://jon.recoil.org/blog/2025/12/an-svg-is-all-you-need.html
238•sadiq•13h ago•90 comments

Denial of service and source code exposure in React Server Components

https://react.dev/blog/2025/12/11/denial-of-service-and-source-code-exposure-in-react-server-comp...
277•sangeeth96•12h ago•171 comments

Litestream VFS

https://fly.io/blog/litestream-vfs/
288•emschwartz•15h ago•78 comments

Stoolap: High-performance embedded SQL database in pure Rust

https://github.com/stoolap/stoolap
65•murat3ok•8h ago•13 comments

Journalism students expose Russian-linked vessels off the Dutch and German coast

https://www.digitaldigging.org/p/they-droned-back
15•harshreality•57m ago•7 comments

Laying out the 404 Media zine

https://tedium.co/2025/12/10/404-media-zine-linux-affinity/?
62•robenkleene•9h ago•5 comments

Show HN: Sim – Apache-2.0 n8n alternative

https://github.com/simstudioai/sim
193•waleedlatif1•16h ago•42 comments

Einstein: NewtonOS running on other operating systems

https://github.com/pguyot/Einstein
62•fanf2•3d ago•3 comments

Smartphone Without a Battery (2022)

https://yaky.dev/2022-09-06-smartphone-without-battery/
4•MYEUHD•1h ago•0 comments

Auto-grading decade-old Hacker News discussions with hindsight

https://karpathy.bearblog.dev/auto-grade-hn/
602•__rito__•1d ago•254 comments

Cadmium Zinc Telluride: The wonder material powering a medical 'revolution'

https://www.bbc.com/news/articles/c24l223d9n7o
42•1659447091•7h ago•12 comments

Craft software that makes people feel something

https://rapha.land/craft-software-that-makes-people-feel-something/
289•lukeio•19h ago•141 comments

The architecture of “not bad”: Decoding the Chinese source code of the void

https://suggger.substack.com/p/the-architecture-of-not-bad-decoding
98•Suggger•19h ago•113 comments

Pdsink: USB Power Delivery Sink library for embedded devices

https://github.com/pdsink/pdsink
38•zdw•5d ago•11 comments

The Walt Disney Company and OpenAI Partner on Sora

https://openai.com/index/disney-sora-agreement/
222•inesranzo•19h ago•458 comments

French supermarket's Christmas advert is worldwide hit (without AI) [video]

https://www.youtube.com/watch?v=Na9VmMNJvsA
340•gbugniot•19h ago•165 comments

EFF launches Age Verification Hub

https://www.eff.org/press/releases/eff-launches-age-verification-hub-resource-against-misguided-laws
328•iamnothere•1d ago•276 comments

Almond (YC X25) Is Hiring SWEs and MechEs

https://www.ycombinator.com/companies/almond-2/jobs
1•shawnpatel•12h ago

Size of Life

https://neal.fun/size-of-life/
2513•eatonphil•1d ago•277 comments

Powder and stone, or, why medieval rulers loved castles

https://1517.substack.com/p/powder-and-stone-or-why-medieval
44•areoform•11h ago•13 comments
Open in hackernews

The tiniest yet real telescope I've built

https://lucassifoni.info/blog/miniscope-tiny-telescope/
54•chantepierre•1h ago

Comments

Nition•1h ago
I always love the moment in blog posts like this, where the writer with their esoteric knowledge of the project will say something like "I almost considered reflaboring the exahenge, but of course it would be a ridiculous prospect for a project of this type". And then always, inevitably, there is the followup edit; "I reflabored the exahenge."

Too rarely in life are things made better than practical consideration would dictate, just because of dedication to the craft.

chantepierre•1h ago
Your comment brings me back to my first mirror making adventure, I was absolutely overwhelmed by the jargon and acronyms used by the mirror making community... a few years later I internalized it and use it as if it was common knowledge. I should put little explanations or details in my posts.
awesome_dude•1h ago
A friend of mine once told me - learning a new field is all about learning the language of that field
eru•52m ago
That's a big part of it, but far from everything.
Nition•58m ago
There was enough there for me to get the basic idea, which is fine I think. Can't really expect every niche post to have all the details necessary for a general audience and it's fun to get a glimpse into these worlds anyway.

Thanks for sharing the post!

chantepierre•1h ago
Hello, author here ! Other interesting builds or projects going on in the french amateur telescope maker community :

  - Sunscan, by the STAROS team : a fully integrated open-source solar imaging kit : https://www.sunscan.net/fr  

  - Eric Royer's binocular 24" dobson : http://www.astrosurf.com/topic/124758-bino600/  

  - The Slim400 by Laurent Bourrasseau : https://www.cloudynights.com/forums/topic/920950-the-slim400/  

  - Astrowl, an electronically enhanced astronomy kit : http://www.astrosurf.com/topic/151807-projet-astrowl-de-visuel-assist%C3%A9/  

  - The smallest, an open-source 6" portable dobson : http://www.astrosurf.com/topic/176898-un-dobson-150-f5-facile-%C3%A0-imprimer-et-assez-compact/

  - A dedicated astrophotography power supply : https://github.com/Antiath/Open-Power-Box-XXL
Of course there are many others but those are the one on the top of my head now
9Mfhf34U•55m ago
Do you have an RSS feed just for the astronomy posts on your blog?
chantepierre•48m ago
No, but that should be quite straightforward to add with Astro, I will check that.

  Edit : it seems that I now do have one : https://lucassifoni.info/blog/tag/astronomy/rss.xml 
I am not an RSS user myself, I tested it with an online reader and it should be working.
fransje26•6m ago
Thank you for the links and the write-up!

I'll share them with a friend who loves astronomy and who loves to organize star-gazing events that he livens up with his Unistellar telescope.

isolli•59m ago
Very nice! But you won't beat this ;)

> Optical Engineer Rik ter Horst shows us how he makes very small telescopes (at home) which are intended for use in micro-satellites.

https://www.youtube.com/watch?v=HxwhCmO90UQ

danhau•53m ago
Came here to link this, but you beat me to it :)
chantepierre•46m ago
Rik's monolithic Cassegrains are the perfect example of the blend of amateur and high-end professionnal work in astronomical optics, thanks for linking it ! His amateur work is incredible, like this 16" CDK : https://www.cloudynights.com/forums/topic/558284-a-400-mm-f1...
ggm•25m ago
When did buying a mirror on Ali overtake grinding your own? I guess when Ali became Edmund scientific ie mirror grinding hasn't been a thing since I was in shorts (the 70s)
chantepierre•15m ago
We buy pre-dug mirrors on Ali to refigure them, or dig and figure our own all the time. See Ali as a supplier of prepolished blanks :) . The l/6 I mentioned in the post are l/6 spheres, so they also need figuring.
upvotenow•4m ago
Woe... Looks good! - I've built a site like this

UpVote a bit like this but more modern - www.upvote.social