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Detecting a pebble at 60M km at 99% of light speed

https://www.jfreedman.space/post/detecting-a-pebble-at-60-million-kilometers-meteoroid-avoidance-at-99-of-light-speed
2•arnoldsparkauth•55m ago

Comments

arnoldsparkauth•51m ago
Author here. I'm a space engineer (PhD, 30+ patents; founded RKF Engineering and Kythera Space Solutions, sold both in 2025) — this analysis started as the technical appendix of a novel I'm writing. Happy to answer questions or defend the math. Full appendix with the complete derivations is a free download: https://dl.bookfunnel.com/zf9caalfyl
jareklupinski•29m ago
wow cowcatchers sure have come a long way https://en.wikipedia.org/wiki/Cowcatcher

Shein and Temu items could face €20 fee in France crackdown on ultrafast fashion

https://www.euronews.com/2026/09/01/shein-and-temu-items-could-face-20-levy-in-frances-crackdown-...
1•Markoff•56s ago•0 comments

BoolCodec: Variable-Length Space-Efficient Sequence of Booleans

https://github.com/ronfriedhaber/boolcodec
1•ronfriedhaber•1m ago•0 comments

Depression Stalls Formation of New Brain Cells

https://www.cuimc.columbia.edu/news/depression-stalls-formation-new-brain-cells
1•gmays•2m ago•0 comments

US, China arm for space warfare: hunter satellites and orbital weapons

https://www.reuters.com/world/asia-pacific/us-china-arm-space-warfare-hunter-satellites-orbital-w...
1•bushwart•2m ago•0 comments

My Agentic Engineering Workflow after 6,775 sessions [video]

https://www.youtube.com/watch?v=c9nRxEy1kUY
1•apitman•4m ago•0 comments

The Vanishing Apprentice

https://cacm.acm.org/news/the-vanishing-apprentice/
1•yarapavan•4m ago•0 comments

MST3K-Anything

https://github.com/jgbrwn/mst3k-anything
1•indigodaddy•4m ago•0 comments

gRPC-Web Failed the Web

https://buf.build/blog/grpc-web-failed-the-web
1•0xedb•5m ago•0 comments

What Are RWAs: From Experiment to Infrastructure

https://rocknblock.io/blog/what-are-rwa
1•dalvrosa•5m ago•0 comments

Decoding Google's Gclid

https://read.vantezzen.io/gclid
1•bennett_dev•6m ago•0 comments

More Nothing Now

https://aeon.co/essays/play-is-doing-its-work-even-if-were-not-keeping-score
1•Towaway69•6m ago•1 comments

Claude Comment Detection

https://entropicthoughts.com/ai-comment-classifier
1•ibobev•6m ago•0 comments

Snickers launches digital bar to feed your "hungry" AI

https://www.snickers.com/hungrai-qa
1•ritwikr•7m ago•2 comments

Auto-Levelling or Histogram Equalization?

https://www.colino.net/wordpress/archives/2026/08/31/auto-levelling-or-histogram-equalization/
1•ibobev•7m ago•0 comments

Calculators Crunch the Integrals You Cannot Solve

https://h3nry-d1az.github.io/blog/posts/2026/06/20/
1•vismit2000•7m ago•0 comments

Plush's New Register-Based Interpreter Is Insanely Fast

https://pointersgonewild.com/2026-09-02-plushs-new-register-based-interpreter/
1•maxime_cb•7m ago•0 comments

WorkGen Translate: decodes slang, idioms, and workplace jargon across age groups

https://gosunny.org/workplace/translate/
1•sea-gold•7m ago•0 comments

Singapore subway (mrt) information display types

https://www.sgtrains.com/technology-infosys.html
1•gregorvand•9m ago•0 comments

Samsung is randomly deactivating some accounts for 'security reasons'

https://9to5google.com/2026/09/01/samsung-account-deactivated-issue/
1•Markoff•11m ago•0 comments

OpenSCAD Skill for 3D Modeling

https://github.com/ModelRift/openscad-skill
1•jetter•12m ago•1 comments

Show HN: Apple's TLS stack can't see weak ciphers, so I craft raw ClientHellos

https://apps.apple.com/us/app/radien-network-toolbox/id6789207545
1•igor_arsenkin•13m ago•0 comments

Explore the Bible like Wikipedia

https://trysojourn.app/writings/explore-the-bible-like-wikipedia/
2•jmathai•13m ago•0 comments

A Hidden Pattern in Your Saliva Can Predict Risk of Colorectal Cancer

https://www.sciencealert.com/a-hidden-pattern-in-your-saliva-can-predict-risk-of-colorectal-cance...
1•gmays•14m ago•0 comments

Lessons from shipping a watch-only Apple Watch app, built with Claude

https://silentbell.app/lessons.html
2•jakublipinski•16m ago•0 comments

How to find an eclipse around another planet

https://signoregalilei.com/2026/08/24/how-to-find-an-eclipse-around-another-planet/
1•surprisetalk•16m ago•0 comments

Just Bury Your Trash

https://www.worksinprogress.news/p/just-bury-your-trash
2•eamag•17m ago•0 comments

Show HN: Thelemail, private email hosting for your own domain

https://thelemail.com/
1•Hexmere•19m ago•1 comments

The Duke of Moctezuma Is Alive and Runs a Marketing Agency

https://friedkielbasa.substack.com/p/the-duke-of-moctezuma-is-alive-and
1•fkozlowski•20m ago•0 comments

Even the oceans are struggling to keep their cool

https://europeancorrespondent.com/en/r/even-the-oceans-are-struggling-to-keep-their-cool
1•speckx•21m ago•0 comments

The Art of Leaping Out of Planes to Fight Wildfires

https://www.newyorker.com/magazine/2026/09/07/the-art-of-leaping-out-of-planes-to-fight-wildfires
1•fortran77•21m ago•0 comments