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Start all of your commands with a comma (2009)

https://rhodesmill.org/brandon/2009/commands-with-comma/
250•theblazehen•2d ago•83 comments

Hoot: Scheme on WebAssembly

https://www.spritely.institute/hoot/
22•AlexeyBrin•1h ago•1 comments

OpenCiv3: Open-source, cross-platform reimagining of Civilization III

https://openciv3.org/
705•klaussilveira•15h ago•206 comments

The Waymo World Model

https://waymo.com/blog/2026/02/the-waymo-world-model-a-new-frontier-for-autonomous-driving-simula...
967•xnx•21h ago•558 comments

Vocal Guide – belt sing without killing yourself

https://jesperordrup.github.io/vocal-guide/
66•jesperordrup•5h ago•28 comments

Reinforcement Learning from Human Feedback

https://arxiv.org/abs/2504.12501
7•onurkanbkrc•42m ago•0 comments

Making geo joins faster with H3 indexes

https://floedb.ai/blog/how-we-made-geo-joins-400-faster-with-h3-indexes
135•matheusalmeida•2d ago•35 comments

Where did all the starships go?

https://www.datawrapper.de/blog/science-fiction-decline
42•speckx•4d ago•34 comments

Unseen Footage of Atari Battlezone Arcade Cabinet Production

https://arcadeblogger.com/2026/02/02/unseen-footage-of-atari-battlezone-cabinet-production/
68•videotopia•4d ago•6 comments

ga68, the GNU Algol 68 Compiler – FOSDEM 2026 [video]

https://fosdem.org/2026/schedule/event/PEXRTN-ga68-intro/
13•matt_d•3d ago•2 comments

Jeffrey Snover: "Welcome to the Room"

https://www.jsnover.com/blog/2026/02/01/welcome-to-the-room/
39•kaonwarb•3d ago•30 comments

What Is Ruliology?

https://writings.stephenwolfram.com/2026/01/what-is-ruliology/
45•helloplanets•4d ago•46 comments

Show HN: Look Ma, No Linux: Shell, App Installer, Vi, Cc on ESP32-S3 / BreezyBox

https://github.com/valdanylchuk/breezydemo
237•isitcontent•16h ago•26 comments

Monty: A minimal, secure Python interpreter written in Rust for use by AI

https://github.com/pydantic/monty
237•dmpetrov•16h ago•126 comments

Show HN: I spent 4 years building a UI design tool with only the features I use

https://vecti.com
340•vecti•18h ago•147 comments

Hackers (1995) Animated Experience

https://hackers-1995.vercel.app/
506•todsacerdoti•23h ago•247 comments

Sheldon Brown's Bicycle Technical Info

https://www.sheldonbrown.com/
389•ostacke•21h ago•97 comments

Show HN: If you lose your memory, how to regain access to your computer?

https://eljojo.github.io/rememory/
303•eljojo•18h ago•188 comments

Microsoft open-sources LiteBox, a security-focused library OS

https://github.com/microsoft/litebox
361•aktau•22h ago•186 comments

Cross-Region MSK Replication: K2K vs. MirrorMaker2

https://medium.com/lensesio/cross-region-msk-replication-a-comprehensive-performance-comparison-o...
3•andmarios•4d ago•1 comments

An Update on Heroku

https://www.heroku.com/blog/an-update-on-heroku/
428•lstoll•22h ago•284 comments

PC Floppy Copy Protection: Vault Prolok

https://martypc.blogspot.com/2024/09/pc-floppy-copy-protection-vault-prolok.html
71•kmm•5d ago•10 comments

The AI boom is causing shortages everywhere else

https://www.washingtonpost.com/technology/2026/02/07/ai-spending-economy-shortages/
25•1vuio0pswjnm7•2h ago•14 comments

Was Benoit Mandelbrot a hedgehog or a fox?

https://arxiv.org/abs/2602.01122
23•bikenaga•3d ago•11 comments

Dark Alley Mathematics

https://blog.szczepan.org/blog/three-points/
96•quibono•4d ago•22 comments

How to effectively write quality code with AI

https://heidenstedt.org/posts/2026/how-to-effectively-write-quality-code-with-ai/
270•i5heu•18h ago•219 comments

Delimited Continuations vs. Lwt for Threads

https://mirageos.org/blog/delimcc-vs-lwt
34•romes•4d ago•3 comments

I now assume that all ads on Apple news are scams

https://kirkville.com/i-now-assume-that-all-ads-on-apple-news-are-scams/
1079•cdrnsf•1d ago•461 comments

Introducing the Developer Knowledge API and MCP Server

https://developers.googleblog.com/introducing-the-developer-knowledge-api-and-mcp-server/
64•gfortaine•13h ago•30 comments

Understanding Neural Network, Visually

https://visualrambling.space/neural-network/
305•surprisetalk•3d ago•44 comments
Open in hackernews

Satellite will have to be turned off when it floats over the US

https://www.thecooldown.com/green-tech/biomass-satellite-carbon-capture-forests/
19•howard941•9mo ago

Comments

perihelions•9mo ago
> "“The primary frequency allocation in P band is for huge SOTR [single-object-tracking radars] Americans use to detect incoming intercontinental ballistic missiles. That was, of course, a problem for us,” Scipal says. To get an exemption from the ban on space-based P-band radars, ESA had to agree to several limitations, the most painful of which was turning the Biomass radar off over North America and Europe to avoid interfering with SOTR coverage."

https://www.technologyreview.com/2025/04/18/1115388/esa-airb...

I guess that's referring to things such as these?

https://en.wikipedia.org/wiki/PAVE_PAWS ("...The radar operates in the UHF band between 420 - 450 MHz...")

echoangle•9mo ago
Maybe my non-native English is showing but I’m having difficulty reading the article. First, it describes how the satellite can’t be used over the US and Europe and then says:

> Still, this isn't the worst setback. [… stuff how the satellite will be used over southern America …]

I was waiting for the description of an even worse setback, which makes the satellite even more limited, but it seems like „this isn’t the worst setback“ was supposed to mean „it’s not too bad, we can still do other useful stuff“. Was that understandable for native speakers?

imglorp•9mo ago
Yes it's a little awkward. I think they mean South America is still ok -- so they can collect data there -- but not North America.
omneity•9mo ago
It's not just you. It feels like there's a missing sentence or paragraph somewhere connecting the two. Maybe there's a compounding effect making the impact of turning the satellite off worse?
kd5bjo•9mo ago
This is one of the annoying constructions in English that has two common meanings which are the opposite of each other. It can either be referring to the worst possible/conceivable setback (as here) or to the worst encountered setback-- you have to use other clues like overall tone and the surrounding context to figure out which was meant.
vntok•9mo ago
Yeah, yeah.
treetalker•9mo ago
You wrote:

> I was waiting …

I think your instinct and expectation were correct. The article reads:

> The info provided by Biomass will be a critical step forward.

I think it should read "The info provided by Biomass would be a critical step forward." ("Would" should be used because it's discussing a hypothetical situation contrary to fact — contrary to fact because the restrictions impede the collection of the desired data.)

My guess is that it's either sloppy editing or LLM-generated text.

casenmgreen•9mo ago
It can be read in two ways.

The most natural way is as you have read it.

However, it is also valid in the sense of "this is a setback, but it's not all that bad". (You might write, "Still, this isn't the worst setback ever.")

You would need to read enough to realize by later lack of a description of the worst setback to realize the former, most natural way, is not in use.

secondcoming•9mo ago
Interesting, I never noticed the ambiguity until you pointed it out.

It's like the awful phrase 'I could care less' I suppose.

jasonlfunk•9mo ago
Why does the title only mention the US? It can’t do it over Europe either.
microsoftedging•9mo ago
Ragebait. Initially I thought it was something Trump did that resulted in this, and I'd assume others may as well.
secondcoming•9mo ago
It's embarrassing that a satellite designed by the ESA can't be used over Europe.

I've read other information about ICBM-detecting satellites being triggered by the sun glinting off lakes having the same signature as an ICBM launch.

Surely the orbit of this satellite will be well known and so false positives alarms can be ruled out?

I suppose it's possible that a bad actor could time a real ICBM launch to coincide with this satellite's orbit to defeat Early Warning Systems, but then again they could just launch submarine-based ICBMs from the southern equator.

Jtsummers•9mo ago
> Surely the orbit of this satellite will be well known and so false positives alarms can be ruled out?

It's not the physical presence of the satellite over the US that messes up (or could) ICBM detection, it's the operation of the satellite's radar system. That's why they have to turn off the radar when it's over the US and Europe.

IAmBroom•9mo ago
Exactly. It's like shining your headlights onto a bunch of people looking at the nighttime sky for constellations.
fred_is_fred•9mo ago
A better title would be "Recon satellite jammer launched by ESA".