HN user

xioxox

1,601 karma

Scientist and astronomer, working in the field of galaxy clusters. I am also interested in data visualisation.

I am the upstream author of the Veusz scientific plotting package: https://veusz.github.io/

Github: https://github.com/jeremysanders and https://github.com/veusz/veusz

Posts30
Comments507
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sky.esa.int 2y ago

ESASky

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355pts55
www.esa.int 2y ago

Einstein Probe opens its wide eyes to the X-ray sky

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www.science.org 2y ago

X-ray survey bolsters prevailing theory of universe's expansion

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phys.org 2y ago

eROSITA sky-survey makes public the largest ever catalog of high-energy sources

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www.mpe.mpg.de 2y ago

The X-ray sky opens to the world

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2pts0
www.esa.int 2y ago

Einstein Probe lifts off on a mission to monitor the X-ray sky

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github.com 2y ago

Ebiggers/libdeflate: Heavily optimized DEFLATE/zlib/gzip library

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en.wikipedia.org 4y ago

The Boring Billion

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arxiv.org 5y ago

SETI in 2020

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www.youtube.com 5y ago

A new way to visualize General Relativity

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www.quantamagazine.org 5y ago

Galaxy-Size Bubbles Discovered Towering over the Milky Way

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www.mpe.mpg.de 5y ago

Detection of large-scale bubbles in the halo of the Milky Way

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en.wikipedia.org 5y ago

Core War

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www.mpe.mpg.de 6y ago

Our deepest view of the X-ray sky

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www.esa.int 6y ago

First sighting of hot gas sloshing in galaxy cluster

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www.mpe.mpg.de 6y ago

Revealing the Beauty of the Hidden Universe: EROSITA Sees First Light

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veusz.github.io 8y ago

Show HN: Veusz – 2D and 3D interactive scientific plotting

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veusz.github.io 8y ago

Scientific plotter Veusz 3.0 is actually Veusz 3D

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arxiv.org 8y ago

The Standard Model of Cosmology: A Skeptic's Guide

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www.nytimes.com 8y ago

Donald Lynden-Bell, Quasar and Black Hole Expert, Dies at 82

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blog.readthedocs.com 8y ago

Advertising on Read the Docs Community Sites

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veusz.github.io 9y ago

Veusz, a GUI scientific plotting package

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www.damianpeach.com 10y ago

Views of the Solar System

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squirrel-lang.org 11y ago

Squirrel – A high-level, light-weight scripting language

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arxiv.org 11y ago

Identifying the source of perytons at the Parkes radio telescope

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www.gamespot.com 11y ago

Elite: Dangerous Drops Its Promised Offline Mode

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blog.startifact.com 12y ago

The Call of Python 2.8

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www.ucl.ac.uk 12y ago

UCL open letter to Paul Dacre, Editor of the Daily Mail

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home.gna.org 12y ago

Veusz: a free GUI scientific plotting package

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www.esa.int 12y ago

ESA's New Vision to Study the Invisible Universe

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Personally, I think social media and academic publishing timescales, rewards and social conventions don't match very well. Social networking feels transient and impersonal. I would like to take some time to form my opinion about a paper, not jump in with a post. Maybe some comment box would be ok to write a couple of nice things about a paper, but it doesn't feel the place to write harsh criticism or have complex discussion where things could be misunderstood. Rather than write in the public record, if I think the paper has a deep flaw I would prefer to contact the authors first. This can be followed up by discussions in your own papers. Others may have different opinions, of course.

What's the good of a perfect railway line if it never gets built? What happened to the capacity argument? There is likely a good optimum between the cheapest and most expensive possible for capacity and speed. We could all fly around in supersonic aircraft, but there's a reason we don't.

Isn't the problem that the requirements for line were "gold plated"? If they'd put in another standard rail line instead, it would have increased capacity, taken up much less space, would have been much cheaper, would have caused less disruption and would have had a clearer business case.

With google I can't find things I know exist. For example, it doesn't find several of my github repositories with unique names that have been there for years. With old google you could drill down a couple of pages of results, but they're not there now. It also prefers worse sources for materials, for example some blog which poorly explains some API, rather than the original documentation.

It's certainly very useful. I do half my work using X11 over ssh and it works reasonably well over a LAN (at least using emacs, plotting, etc).

Unfortunately the LibreOffice Impress is pretty bad. PowerPoint is what keeps me using Office. LibreOffice formatting looks bad on the screen (it resizes bitmaps to make the fuzzy) and the user interface for constructing slides is both clunky, slow and buggy. I don't understand how the UI can be this slow in 2025 on a fast PC. Basic functionality, like resizing an equation, just doesn't work.

That's not right. I'm an astronomer, and I often look at colour images and colleagues do, too. For example, the galaxies in a cluster of galaxies follow a relation of colours - brightness (the "red sequence"), which can be used to detect the cluster. The eye is also quite good at helping confirm a cluster by spotting the galaxies following this sequence. I also use colour images to help identify spectral changes that change across an image, in my case in the X-ray waveband.

I have Django code which creates a tar file on the fly from a list of requested files and works well. It doesn't use intermediate storage. The tar format can be pretty simple. I got most of the way into implementing a uncompressed zip version, but then I realised that tar was good enough for my site.

I've never tried Factorio, but I found Satisfactory very boring after a few hours. It was initially fun to do some exploring and make some initial manufacturing lines. However, when I realised that to scale up the manufacturing, then I would have to place all these components by hand hundreds of times, it just felt like boring make-work, and I never turned it on again. Maybe I would have continued if there was some way of automating the building, such as some sort of 2D viewer.

Excellent work. I wanted to do this recently, but it was surprisingly hard to find code to calculate an approximation. I've bookmarked it for when I next need a quick approximation for a function.

tsocks is quite useful for proxying a program's network access over ssh using SOCKS. I use it for accessing geo-blocked servers using command line tools without a full VPN.