Hacker News: visviva

Gemini responds to request to turn on lights with hallucinated jailbreak prompt

visviva — Sun, 08 Feb 2026 13:16:46 +0000

Article URL: https://www.reddit.com/r/googlehome/s/Lh3dYqccgB

Comments URL: https://news.ycombinator.com/item?id=46933940

Points: 6

# Comments: 3

New comment by visviva in "I made Zig compute 33M satellite positions in 3 seconds"

visviva — Wed, 21 Jan 2026 17:57:44 +0000

Totally agree. Cool little project, but I cannot think of one use case where this is needed.

> But "fine" starts to feel slow when you need dense time resolution. Generating a month of ephemeris data at one-second intervals is 2.6 million propagations per satellite.

Ok, except SGP4 loses its accuracy over WAY shorter time frames than a month (think hours/days)

> Pass prediction over a ground station network might need sub-second precision across weeks.

a) sub-second ephemeris for antenna pointing is crazy overkill, and b) same comment about accuracy as above.

First all-solid-state battery in production vehicles

visviva — Mon, 05 Jan 2026 20:57:07 +0000

Article URL: https://www.donutlab.com/battery/

Comments URL: https://news.ycombinator.com/item?id=46504847

Points: 4

# Comments: 0

New comment by visviva in "Genergo: Propellantless space-propulsion system"

visviva — Fri, 14 Nov 2025 22:23:49 +0000

Impossible claim with no evidence offered - curious why this is on the front page.

New comment by visviva in "Exploring a space-based, scalable AI infrastructure system design"

visviva — Tue, 04 Nov 2025 17:59:07 +0000

It will require a number of innovations just to solve the formation flying aspect of the system, not to mention the other challenges (listed and not)... good luck with that.

A few things to know before stealing my 914 (2022)

visviva — Wed, 08 Oct 2025 19:16:10 +0000

Article URL: https://www.hagerty.com/media/advice/a-few-things-to-know-before-you-steal-my-914/

Comments URL: https://news.ycombinator.com/item?id=45519575

Points: 350

# Comments: 185

New comment by visviva in "Caligra Workbench"

visviva — Sat, 09 Aug 2025 21:10:32 +0000

There are a couple interesting-sounding claims made here but there is basically no detail to be found, which strikes me as odd at best and suspicious at worst.

New comment by visviva in "Ask HN: What Pocket alternatives did you move to?"

visviva — Fri, 18 Jul 2025 01:13:44 +0000

I've been using Instapaper for many years to collect things to read later, and I use Pinboard to archive things that I've read and want to save.

17,000 new ways to multiply 3×3 matrices

visviva — Tue, 10 Jun 2025 15:37:47 +0000

Article URL: https://www.sciencedirect.com/science/article/pii/S0747717120301139

Comments URL: https://news.ycombinator.com/item?id=44238143

Points: 3

# Comments: 0

New comment by visviva in "As a developer, my most important tools are a pen and a notebook"

visviva — Wed, 28 May 2025 18:35:09 +0000

I was kind of hoping for a deep-dive on notebook types and features, not gonna lie.

Wow@Home – Network of Amateur Radio Telescopes

visviva — Sat, 17 May 2025 02:02:14 +0000

Article URL: https://phl.upr.edu/wow/outreach

Comments URL: https://news.ycombinator.com/item?id=44011489

Points: 196

# Comments: 35

New comment by visviva in "The Problem with Modern Engineering Isn't Speed. It's Chaos"

visviva — Wed, 23 Apr 2025 02:27:00 +0000

*The problem with modern software engineering

Dennis Gaitsgory Wins Breakthrough Prize

visviva — Sun, 06 Apr 2025 23:53:41 +0000

Article URL: https://www.scientificamerican.com/article/dennis-gaitsgory-wins-breakthrough-prize-for-solving-part-of-maths-grand/

Comments URL: https://news.ycombinator.com/item?id=43606062

Points: 3

# Comments: 1

Nyx: Open-source spaceflight mechanics and mission analysis software

visviva — Wed, 12 Feb 2025 00:37:32 +0000

Article URL: https://nyxspace.com/

Comments URL: https://news.ycombinator.com/item?id=43020297

Points: 3

# Comments: 0

Hacker hijacks and repairs Beesat-1 satellites from the ground

visviva — Sun, 12 Jan 2025 14:48:33 +0000

Article URL: https://www.heise.de/en/news/38C3-Hacker-hijacks-and-repairs-Beesat-1-satellites-from-the-ground-10221522.html

Comments URL: https://news.ycombinator.com/item?id=42673912

Points: 1

# Comments: 0

New comment by visviva in "New Calculation Finds we are close to the Kessler Syndrome [video]"

visviva — Wed, 20 Nov 2024 20:44:57 +0000

The paper in question is here: https://link.springer.com/article/10.1007/s40295-024-00458-3

It adds to a pretty large body of literature around this subject, the gist of which is "risk is going up, but we don't really have a good way of estimating what that means in terms of actual collision rates".

Mapping the Ionosphere with the Power of Android

visviva — Thu, 14 Nov 2024 11:09:04 +0000

Article URL: https://research.google/blog/mapping-the-ionosphere-with-the-power-of-android/

Comments URL: https://news.ycombinator.com/item?id=42135076

Points: 3

# Comments: 1

New comment by visviva in "Intelsat 33e breaks up in geostationary orbit"

visviva — Mon, 21 Oct 2024 19:28:21 +0000

Astrodynamics

New comment by visviva in "Intelsat 33e breaks up in geostationary orbit"

visviva — Mon, 21 Oct 2024 14:46:58 +0000

The most likely options are that it was struck by debris or that there was an explosion onboard. Those two are not mutually exclusive, either.

New comment by visviva in "Gunter's Space Page"

visviva — Tue, 08 Oct 2024 00:54:29 +0000

This has been an indispensable resource in my career, to the point that I will frequently search for " gunter", knowing that he'll have the best collection of information available openly.