return to table of content

Stellarium: Software which renders realistic skies in real time

prepend
29 replies
1d1h

I’m interested that this project, and many other visual projects, don’t have example images in their readme.

skydhash
14 replies
1d1h

The project website is at http://stellarium.org/. There is no need to have images inside a project repository. Every maintainer already knows what it looks like. What next? Marketing materials?

BonoboIO
8 replies
1d1h

Sorry, but one screenshot would be enough to demonstrate what the repository is about.

So many project fail at this.

recursive
6 replies
1d

The website has more than one.

ParetoOptimal
5 replies
1d

When quickly browsing github projects to see what's worth my time I don't always click the website link.

I likely skip over repos with no screenshot much more.

mihaic
4 replies
23h23m

What purpose are you browsing projects on github? Genuine question, as I've never done this.

ParetoOptimal
3 replies
22h53m

To find active popular open source projects?

How do you do it?

skydhash
1 replies
22h5m

Word of mouth, organic exposure. I've only used github search only for a few time aside from quickly finding one of my repositories.

ParetoOptimal
0 replies
22h0m

Typically github readme's are targeted at busy developers rather than beginner s as well.

They also include a contributor guide so I can see how hackable some project I'm using is.

I also prefer to use projects I wouldn't hate hacking on if forced to. So a PHP project has a much higher bar than aHaskell project.

Github and other forges easily allow this approach.

mihaic
0 replies
2h55m

I don't actively try to find active open source project, usually I stumble onto plenty of them from natural browsing/research for my own work

That's why I was asking, why would you actively search for projects? To consider contributing or just out of curiosity?

tanvach
0 replies
1d

love to see what your project repo looks like as a comparison.

simonklitj
4 replies
23h17m

I disagree. Users, not just maintainers, discover projects through GitHub. In this context, the README effectively serves as a secondary project landing page. IMO, for a visual project like this, images, or a direct link to images, is a must.

dylan604
3 replies
23h4m

Then a link to the website which is a much better medium for demonstrating software than README files would be a simple fix.

prepend
2 replies
22h28m

Then a link to an example image on the web site is much better.

The idea is to help people understand the project. Not to give them an investigation task. I don’t know the structure of that web site or if there are even images there.

otterley
1 replies
22h5m

The first time in your life that you learn that a project's code lives on GitHub and its documentation and marketing website are someplace else, you'll start looking for the website reference in the GitHub README or searching for it as a matter of course. It's really not that big a deal.

prepend
0 replies
20h48m

It’s not a big deal. It’s just a useful piece of documentation.

I’m not heartbroken because of this gap, I’m just confused why they wouldn’t want to add these docs to help users.

deadbabe
4 replies
23h47m

What’s more amazing to me is that for open source projects like this where anyone can contribute, people would rather complain about the lack of a screenshot instead of submitting a pull request adding a screenshot to the README.

You could probably become a very prolific contributor just by adding a screenshot to every such repo you come across.

Kharacternyk
3 replies
22h26m

I imagine a lot of such pull requests wouldn't be merged.

deadbabe
2 replies
21h8m

I submitted one, it may never be merged, but at least now I can say I tried. And isn’t that what open source is about?

Kharacternyk
1 replies
20h24m

If it requires little effort, it's fine, but generally before working on something one should ask the maintainers whether the status quo is deliberate.

deadbabe
0 replies
20h13m

They are free to reject the pull request. The worst they can say is no.

Ecco
4 replies
1d1h

Agreed. It’s a freaking image generator yet there is zero sample picture on their GitHub page… That’s terrible :-/

sorokod
3 replies
1d1h

stellarium.org link is on the GitHub landing page twice - chill.

prepend
2 replies
1d

I followed that link and didn’t see any images there.

I could also google “stellarium project images” but I think my point is that I would expect projects to be as explicit as possible about “this is what we make.”

slater
0 replies
1d

There's a "view screenshots" link front and center on stellarium.org

here ya go:

http://stellarium.org/screenshots.html

cbsks
0 replies
1d

Maybe your ad blocker is acting up? I see a carousel with 5 images and a link to the full screenshots.

bee_rider
1 replies
23h31m

I wonder if it is just a change over time? I expect READMEs to be formatted primarily to be opened in the terminal… nice 80 column plain text files.

dylan604
0 replies
23h0m

This is my primary experience with READMEs as well. I feel like this is one of those new users not appreciating the history and morphing into something they understand with zero interest in the old ways

degenerate
0 replies
1d1h

I imagine some OSS authors don't consider someone visiting the GitHub readme before visiting their website. I can't fathom thinking like that, but it must have never crossed their mind.

Here's the screenshots: https://stellarium.org/screenshots.html

daniel-thompson
0 replies
1d1h
igor47
23 replies
1d1h

I love stellarium on my phone. It even identifies satellites! I've seen the ISS with my own eyes! (It looks like a glowing dot)

mixmastamyk
6 replies
21h47m

Just installed it and nonstop upgrade ads, not what I expect from a GPL app. Maybe one or two but nagging, no.

loloquwowndueo
4 replies
21h43m

Why not? GPL is free as in speech, not as in beer.

All it implies is: you can get the source code, so if you don’t like the official App Store version you’re more than welcome to build your own.

mixmastamyk
1 replies
21h41m

Not allowed to install, no. Can’t recommend it.

As I said, don’t mind here and there… it’s helpful. But nag me and get replaced.

michaelmrose
0 replies
20h8m

Its worth mentioning that nobody is doing anybody a favor by using their free software. It seems pretty plain that the free version is a trial you are expected to uninstall or upgrade.

ugh123
0 replies
19h42m

But can I use it to build a better, paid-for, app without having to give up my source code because of the GPL thing?

thomond
0 replies
17h7m

The Android and iOS versions of stellarium are not open source so you can't compile you're own versions.

thomond
0 replies
17h6m

The Android and iOS versions of stellarium are not open source or GPL. Only the desktop versions are.

Kye
6 replies
23h17m

It's one of the few things left in too-bright places that can introduce someone to the wonders of space in a way images and video can't. Some neighbors finally stopped and asked why I stood at the road looking at the mostly starless sky most nights.

"Waiting for the space station." (and other satellites, but those are harder to see)

"I didn't know it was still a thing."

It started as a little dot on the horizon, barely visible in the hazy light from the city, then built to a blinding light above. I heard a "holy fuck" so I guess they were suitably wowed.

kstrauser
2 replies
20h38m

I make my kids wave at it. There's a manned spaceship flying over our heads at 17,000 mile per hour. We see it, we wave.

Kye
1 replies
18h21m

You can go a step further: get them into ham radio and talk to the astronauts as they fly over. Then when/if that gets boring, move on to SSTV and SDR.

kstrauser
0 replies
18h16m

I already have my extra license. I don't need a lot of convincing to take out a second mortgage for radio gear.

jiggawatts
0 replies
20h22m

Something my partner and I noticed during the full lockdown of the pandemic was that the lack of aviation made it much easier to notice spacecraft.

In a big city with an airport a moving light in the sky is almost always a jet at high altitude.

But with nearly zero flights, it was more likely to be a satellite or the space station.

globular-toast
0 replies
21h3m

It's such a shame Iridium flares are no longer a thing. The ISS is in the sky a bit too long really. I've showed people and they thought it was a plane (despite telling them a planes lights would flash). A good Iridium flare was unmistakable though and quite the arresting sight.

The last one I be tried to look for would have been perfect. It was supposed to happen on a friend's wedding night. It happened but was thoroughly unimpressive. I found out soon after the satellites were in the process of being decommissioned and flares were no longer happening as predicted. By now they're all gone and we just get boring objects like the Starlink satellites.

UberFly
0 replies
21h20m

I once saw it go over by chance with a Japanese module closely following. It was very cool.

dewey
3 replies
23h29m

I use Sky Guide on my phone and it's still one of these apps that make "modern" technology feel amazing, similarly to just being able to point Flight Radar at the sky and see where a plane is going.

samstave
1 replies
23h24m

Does this require the paid FR acct?

dewey
0 replies
23h21m

No, I have a paid account to remove ads but the base functionality doesn't require it.

Kye
0 replies
23h16m

I've probably sold a few copies of this from people asking why I was pointing my phone at the sky.

dclowd9901
1 replies
1d

I always liked trying to find the ISS myself while camping but there’s so damn many satellites up there now, it’s hard to tell which is which!

Kye
0 replies
23h11m

The ISS will be the really bright one. I think the last Iridium satellite that flares was decommissioned a while back, but you might see those too.

petee
0 replies
1d

I do too, its alot of fun identifying random satellites, plus the paid version is an easy way to financially support the desktop. And the developers are actually responsive, which is refreshing.

dylan604
0 replies
22h57m

all satellites viewed with the naked eye look like a "glowing dot". in long exposure images, they look like long single pixel streaks which makes them easily different than a meteor which flares wider in the middle before narrowing again as well as also changing colors.

anjel
0 replies
20h3m

When the ISS transits the full moon, is way more than a for. The solar arrays are easily discerned.

marcodiego
12 replies
23h43m

Long time ago I wanted to make a small contribution to Stellarium. I have a telescope and "surface brightness" is a much better metric than what it showed at the time. I downloaded the code and with a quick inspection found out how to implement it. I modified the code and prepared a patch. When I was going to send it, I discovered someone else had simply implemented it a few days earlier. Nice. It saved me a little work.

Now, what impressed me: I didn't explore it much but it gave me a very good impression of the code. I could find what I needed to change and someone else, without talking to me about it had the exact same idea. The changes were EXACTLY the same. I can only think this code is extremely high quality. It seems to be a standard developers should aim for.

cbolton
7 replies
23h38m

Interesting measure of code quality! I think it's the first time I see it.

throwaway_8462
3 replies
21h34m

I think it also is a measure for technical debt. If someone can easily understand the code and make changes, it is a sign of low technical debt.

Too often developers measure code quality by applying personal subjective measures, like number of lines per method, DRY or choice of programming language and start making major refactoring based on personal preferences.

If someone without knowledge of the code can swoop in and make meaningful changes, it does not matter how many lines of code there is or if it is built with X or Y. It's the end result that matters.

vendiddy
1 replies
5h56m

Not sure why this post is anonymous. I wish most folks would treat code quality this way!

How hard is it for a developer make this particular change?

And I mean literally observe this up close: navigating the directory structure, reading the docs, typing the code, running the app to check if everything works as expected.

Was it easy? What can change about the code, tests, docs, etc so future changes can be easier?

That's what really matters. Other measures are just proxies to the above analysis.

throwaway_8462
0 replies
5h3m

Not sure why this post is anonymous

Honestly, my work place is filled with inexperienced people who have decided what the right approach should be. I'm older and more experienced than most and have learned that I can't win all battles, and bite my tongue when I see them making bad decisions. It's a form of age discrimination where even the management thinks that "young people see problems with fresh eyes". I don't want to come across as an "ok boomer" developer stuck in their old ways. "Rewrite everything in the new untested framework? Sure why not. The code is over 2 years old, so it's full of crusty legacy code".

I may seem a bit bitter in my comments, but I'm mostly disillusioned and are trying to see it as a learning experience. I'll give my opinion sometimes, and if they don't follow it it's not my problem. They will just need to learn the hard way and will probably end up in my situation in a few years.

I'm just collecting my pay check and planning to move on to a work place with more balanced demographics.

turdprincess
0 replies
1h18m

As a converse view point, in my experience, in terms of huge methods and huge files / classes, its rare to see developers who have the mindset of "in general, I prefer small files and classes, but in this case, it makes sense to have a huge function, so I make an exception."

What I do see every day is "oh yeah, this method / file is pretty big, lets add one more thing to it anyways, I dont have time to refactor", and things grow and grow out of control.

I think one basic, and yet rare ability of a professional software engineer, and the skill that should separate you from a hobby programmer, is writing your code in a way which can scale and grow. The strategy for this cannot just be "let me put everything in one file, class, method and lets just see what happens".

That can be an OK first draft approach, but there needs to be a second step. And ultimately, if you set the architectural pattern of "big hairball", everyone else will happily follow it since its not their fault the architecture is like that - they are just adding one more thing. That can be OK for a first draft, but you will have to go back and introduce architecture and modularity at some point, or watch the project collapse under the weight of its own mess.

Once you see enough of those failures, you can start sensing basic patterns for introducing modularity, boundaries and structure to a project, to its modules, and to its classes and methods. As you keep flexing that muscle, in my experience, the "this code is best written as a huge single method" approach basically never seems like a good idea anymore.

tantalor
1 replies
23h35m

There should be one-- and preferably only one --obvious way to do it.

cbolton
0 replies
22h46m

Haha right :) Though I feel we're talking of different levels of granularity: I've seen that quote applied at a level close to single operations, which makes sense when you're making judgment on a programming language or API. In OP's case I imagined a somewhat larger piece of code.

kristopolous
0 replies
19h39m

Check out the NetBSD or OpenSSH source. Both are exceptional

derefr
2 replies
23h23m

I think this is the sort of thing that developers really want, when they consider introducing a Domain Specific Language into their project: to take changes that, for either language-level or project-architecture reasons, currently have to be made, painfully, across N different parts of the code, ensuring they're all coherent with one-another and that none are missed; and to replace that with such changes requiring that only one piece of code be changed, where that code communicates the central spirit of the business constraint, from which all of the changes to disparate concerns in different modules, can then be derived.

But, of course, even more ideally, you can 1. choose a language and 2. architect your project in such a way, that you don't even need any DSLs in order to accomplish that. :)

nine_k
1 replies
16h34m

Usually it's not a full-blown DSL, but a good set of data structures, interfaces, and functions, all implemented within some general-purpose language.

Usually you need to have your data model right, and all else follows more easily.

d0mine
0 replies
15h31m

data model

"The building of the program is the same as the building of the theory of it by and in the team of programmers"

https://pablo.rauzy.name/dev/naur1985programming.pdf

doubloon
0 replies
18h29m

i was working on internationalization for a big C++ / QT project and I basically just copied the technique + strategy that Stellarium used. worked great.

Arnavion
10 replies
23h54m

Stellarium is also scriptable, so I was able to write a cronjob that would launch Stellaris in an invisible background window, set my latitude and longitude, set a bunch of display options, save an image of the rendered sky to a file, and then update my desktop wallpaper to that file.

But then I ended up not using it, because I use a tiling WM so I rarely see my desktop anyway lol. It's at https://github.com/Arnavion/sway-wallpaper-stellarium if anyone wants to use it.

TheDesolate0
8 replies
23h47m

You don't see your desktop as in it's always covered or as in your WM hides the root window?

Arnavion
6 replies
23h40m

The former. A tiling WM covers the entire desktop with whatever windows are visible in the workspace. One window starts out full screen, creating a second window halves the first one and tiles them side-by-side, and so on. I would only see the desktop when I switch to a new empty workspace, but the reason I switched to a new empty workspace in the first place is because I wanted to start a new window there, so that glimpse of the desktop would be short-lived.

Kharacternyk
5 replies
22h33m

Many tiling WMs have an option for gaps between the windows. Do you find them unpleasant? I love my 8px gaps. Most of the wallpaper is still covered, though.

8n4vidtmkvmk
4 replies
21h29m

I personally hate those gaps. Wasted space.

castalian
2 replies
21h20m

Maybe these gaps should be filled with decoration. Like with ornaments similar to those you can find in medieval books.

myself248
0 replies
18h34m

Oooooo, window borders that look like an illuminated manuscript?

I need this before I screenshare into my next Teams call...

heywoods
0 replies
18h59m

To each their own. <3

kqr
0 replies
12h38m

I agree. For me the point of a tiling window manager is that it efficiently uses the screen space automatically. I don't have to drag windows around to do it.

Automatically wasting space sounds less attractive...

mschulkind
0 replies
23h37m

Tiling window managers generally size windows as large as possible. Windows only shrink to make way for other windows, so unless you do something weird, or switch to a desktop with no windows, or have some sort of transparency enabled, you won't see your background at all.

sam_lowry_
0 replies
19h41m

Thanks for the idea and for the code!

wdfx
6 replies
19h50m

Stellarium can also interface to hardware, so you can use it as a front end for go-to mounts and telescopes.

It's my software of choice for setting up my DIY astrophotography rig.

https://doug.lon.dev/2023/09/19/astro-camera-mount.html

NKosmatos
3 replies
19h6m

Wow, nice and extensive write up! Share some more photos (if you like) and also write something about focusing (I’m assuming you’re using a Bahtinov mask) and stacking.

wdfx
2 replies
7h28m

If I'm honest I struggled to complete the write up as I wanted to be reasonably detailed about each step of the design and build. I appreciate it could do with a few more photos or illustrations, and I may come back to this in due course.

eddyg
1 replies
4h33m

Really enjoyed reading about your build — I learned quite a bit! I do understand what a slog it can be to write up something with a lot of technical details, so thanks for taking the time! Any suggestions on good resources for learning Fusion 360 with a focus on creating models for 3D printing?

wdfx
0 replies
4h2m

I can't recall what resources I used to improve with Fusion 360; there are a wealth of resources out there, I recall I did watch a few youtube vids on the subject. I'm not a complete stranger to CAD though, I've dabbled here and there for about 20 years or more, once I got a grip on the core workflow of Fusion it came together quite easily, and couple that with playing around with the various tools to see what works. There are times in the modelling flow that you may get a bit stuck due to the order of operations you have applied. Fusion keeps a timeline history of operations and it's somewhat possible to "refactor" it by moving things around - that can both fix things and also make your model break completely. So, I'd recommend looking up best practices for your model and history management. Also, don't expect to get your modelling right first time, or to be able to learn using your main project model, you can easily learn a lot using a bunch of test files to try things out, and apply those techniques to your project afterwards.

With regards to using it for 3d printing - I don't recall again using any specific resources for this, but the main thing was figuring out tolerances and fit for parts. Again, use test models and print small test parts to see what works on your printer. Fusion's parameters can help here, as you can set up variables for tolerances/spacings and update them after the fact.

l_nk
0 replies
19h13m

Thats really cool! Nice build :)

exar0815
0 replies
19h9m

Another Software for that is KStars/EKOS. It also does fancy stuff like plate solving and focusing with external focusers. Pretty Powerful, especially in combination with Astroberry

qwertox
6 replies
22h59m

Interesting, they have a web version available:

https://stellarium-web.org/

Graphics performance and quality in browsers has improved so much in the last decade.

tomcam
5 replies
21h48m

Agreed, but I'm thinking this could have been done 15 years ago or more? Google Maps let you scroll around in real time way back when. Not correcting, just sort of asking--I'm way behind on how graphics coprocessors work these days.

tkzed49
4 replies
20h13m

Maybe you could have used Shockwave or something? But until WebGL implementations were shipped in 2011, there was no 3D API accessible from Javascript. At the time, Google Maps just did 2D tile scrolling. I remember being super impressed when it started letting you zoom out to the globe like you could do in Google Earth.

ummonk
3 replies
19h41m

It's trivially easy to do 3D graphics using a 2D API if you don't need rasterized z-buffering (which Stellaris obviously doesn't).

tkzed49
2 replies
10h41m

You should try writing some code to pixel-shade a screen-sized canvas in JS (which you'd have to do to get the textured skybox). I don't think the performance would be usable, especially 15+ years ago.

ummonk
1 replies
9h47m

You simply chop up the textured skybox into tiles and then draw them using transform and drawImage. This was supported beginning in 2008.

Sure it wouldn't be as perfectly accurate as a custom shader for rendering accurately rendering each pixel of a spherical skybox, but it would certainly be good enough.

tkzed49
0 replies
6h46m

Alright, seems plausible in this case :)

theossuary
5 replies
1d1h

Does anyone have any resources for projecting stellarium onto the ceiling/walls of a room to mimic the sky above/around? I dug into it a bit and it seemed like projecting into a boxy surface could be accounted for easily enough. But I couldn't find a projector for a decent cost that wasn't too bright. Would be a really fun diy project for me, if I could figure out the hardware.

petee
2 replies
1d

I cant find the link, but I i recently saw a projector project where someone used a deconstructed android phone with the backlight removed from the screen, and a light/lens combo to get >1080p. Though that limits you to Android apps or RDP, it might be a starting point to hack your own.

Stellarium does have an android app but its a fraction of the desktop app functionally.

_Microft
1 replies
1d
petee
0 replies
23h1m

Yes it was, didn't realize it had been three years already though!

dharmab
0 replies
1d

Warthog Project built a multi-projector surround display that might be of interest: https://www.youtube.com/watch?v=AsleWkgOsak (later upgraded to 270 degrees).

HDR Projectors are also a thing now: https://youtu.be/iFJsEfWsTd4?t=852

InvertedRhodium
0 replies
23h43m

It’s not stellarium, but I’ve got a DarkSkys DS1 and bought my parents a FX model and they both have far higher fidelity in the image displayed due to using chrome disks instead of a screen. It looks better than anything I’ve ever seen at home.

https://dark-skys.com/collections/projectors

nanna
5 replies
1d

Stellarium is wonderful. My favourite feature is the ability to change sky culture. The Japanese one is so strange and poetic. A single band of small constellations that crosses the sky like a vertical line of Kanji and includes constellations with names like 'emptiness'.

PaulDavisThe1st
4 replies
23h18m

Indeed.

Though it was a bit of a shock in an/the Arabic sky culture to find one of their constellations called "Woman chained to a post"!

loloquwowndueo
1 replies
21h44m

Does the Greek/western Andromeda constellation shock you equally? Because that’s what it is as well.

antognini
0 replies
20h25m

That whole region of the sky is quite impressive, because along with Andromeda chained to the rock, there is Cetus, the sea-monster, approaching to devour her; Perseus, the hero, flying to her rescue; Pegasus, the winged horse upon which Perseus is flying; Cepheus, Andromeda's father; and Cassiopeia, Andromeda's mother, whose actions set the whole story in motion.

pengaru
0 replies
19h59m

Though it was a bit of a shock in an/the Arabic sky culture to find one of their constellations called "Woman chained to a post"!

Welcome to mythology, no need to portray this as a uniquely Arabic horror.

https://en.wikipedia.org/wiki/Andromeda_Chained_to_the_Rocks

bluish29
0 replies
21h24m

I think a more accurate translation will be chained woman. At least the name used in Arabic culture [1].

[1] https://ar.wikipedia.org/wiki/المرأة_المسلسلة_(كوكبة)

EarthLaunch
5 replies
1d

I used Stellarium to generate the realistic (but somewhat over exaggerated clarity) skies for my web game. The day/night cycle only shows stars at :50-00 of each hour: earth.suncapped.com.

I'll edit into this comment a link to the texture files if I can, but the game uses compressed (ktx I think) textures since the star textures are large resolution, one of the largest game assets!

I picked a particular date, time, and place on earth for rendering the sky in Stellarium. It also had options for seeing (clarity) and which features to show, such as planets or space debris.

samstave
3 replies
23h21m

Cool webgame... whats the premise tl;didnt-go-to-discord?

EarthLaunch
2 replies
21h45m

Thank you. Right now it's a just explorable small section of Colorado. The premise is a post-earth world where players build up villages around trade, inspired by Ultima Online.

samstave
1 replies
20h12m

UO Super Vet here. (was in the beta - we ran the Intel Game Lab DRG - and we ran 6 of intels top boxes with a t3 to the lab and just decimated)

Dread Lord Phlux, HellFire Guild - Napa Shard. (and others) have tons of stories)

-

Would be interesting to grab the openGIS point maps of that section of colorado and make that the mesh - since your doing Stellarium for the sky.

There is also that guy that made the tool to grab the 3D tiles from google earth for converting to meshes...

EarthLaunch
0 replies
20h9m

The map is based on GIS data of Colorado :) Including terrain elevations, landcover, and water.

EarthLaunch
0 replies
20h34m

Here's an original PNG exported from Stellarium. For the game this had to be reduced and compressed a lot: https://i.imgur.com/v3g219F.png

Screenshot of how it looks in-game, this is Stellarium-generated and shown as a KTX texture on a 6-sided skybox: https://i.imgur.com/bkW2CXX.png

globular-toast
3 replies
21h11m

I love Stellarium. It got me into stargazing. I didn't realise at first that you can play with time, speeding it up, or go to specific times in the past or future to watch certain events like transits.

There was another free software program that I thought of as a companion to Stellarium that let you fly through space. It used logarithmic scales for everything to make it manageable and really gave you an idea of the vastness of space. But I can't remember the name of it nor has searching brought it up.

I'm hoping somebody here knows what I'm talking about.

anthk
1 replies
19h24m

Celestia, KStars, Carte du Ciel...

globular-toast
0 replies
9h24m

Celestia was the one!

Kerb_
0 replies
17h30m

Space engine?

toddmorey
2 replies
22h46m

1.6 billion known stars. Is that known as in labeled?

venice_benice
0 replies
15h46m

well yes, but it likely will be a “telephone number” and not even a simple one like say `2MASS J19593766+2246141` which is 2MASS (the survey name) and the coordinates of the star in the J2000 epoch: 19:59:37.66 +22:46:14.1 .

The Gaia ones (which is the billion star catalogue) look like `Gaia DR3 1827256624493300096`; the number basically contains the rough coordinates of the star as a HEALPix index (along with some other data) so it's not really human readable, but is perhaps more suited for a survey with billions of sources.

Ironically, the Gaia catalogue is incomplete at the brighter end (very bright stars like Betelgeuse for example are not in the catalogue at all) so still needs to be supplemented by other catalogues (and can't be used as a single source of truth to which all other catalogues are cross-matched for example)

HEALPix: https://en.wikipedia.org/wiki/HEALPix

cbolton
0 replies
22h43m

I guess... From https://en.wikipedia.org/wiki/Star_catalogue :

The largest [catalogue] is being compiled from the spacecraft Gaia and thus far has over a billion stars.

I think you'd have to go out of your way to "know" a large number of stars without having some equivalent of a label to keep track of them.

piloto_ciego
2 replies
21h39m

There seem to some Stellarium people here! It’s a very cool app - does anyone know if it’s possible to capture images from it programmatically?

nvalis
1 replies
19h54m

There is, for example like this: https://news.ycombinator.com/item?id=38982971

piloto_ciego
0 replies
17h34m

Oh this is perfect thank you!

mig39
2 replies
23h35m

Every time I see something interesting on hn, the first thing I try is:

brew install stellarium

I love it when it works!

cdelsolar
1 replies
16h41m

Huh?

mig39
0 replies
16h27m

Homebrew, which is a package manager for macOS.

Kharacternyk
2 replies
1d1h

I use the mobile version regularly, especially when it's warmer outside than it is now, and TIL that it is open source. Now I consider purchasing the pro version, as a form of donation.

brunoqc
1 replies
1d

The pro version is a bit pricey, for an open source app and for something most people will only use on occasion. Also an app like this doesn't do much so I wonder why limit it by locking-away some features.

jayknight
0 replies
1d

SkySafari is a better app for actually doing astronomy, but the pro version is quite expensive, and each major version is a new app that you have to pay for again if you want to upgrade. I bought it a few versions ago and still use it regularly.

29athrowaway
2 replies
1d

Also worth mentioning: https://celestiaproject.space/

It used to be packaged and readily available in most distros, now it is not. I wonder what's that about.

You can zoom out and see the local group and Virgo supercluster.

coder543
1 replies
1d

The Celestia project was dormant for nearly a decade. It becomes hard to package unmaintained software. I haven’t kept up with who the new owner is or what they’re doing, so there could be reasons it hasn’t been picked up again by the distros.

Back in the late 2000s, Celestia was certainly an amazing experience for me. I see there’s a mobile version now, which makes me happy. It works pretty well on my iPhone, although the UX is not perfect.

29athrowaway
0 replies
23h35m

I think there is a Flatpak that addresses most of the installation grief.

1024core
2 replies
22h11m

Is there a text-based version of such a thing? Say I give that lat/long and date/time; I want to know the positions of the planets and some of the major stars.

madphilosopher
0 replies
21h19m

Search for ephemeris software.

For all my projects, I use the Swiss Ephemeris[0]. Their commandline swetest will give you the data you're after.

[0] https://www.astro.com/swisseph/swephinfo_e.htm

jes5199
0 replies
20h29m

planets only, but I spend a log of time playing with the NASA JPL Horizons system: https://ssd.jpl.nasa.gov/horizons/app.html#/

wlindley
1 replies
22h3m

Grammar nitpick: it is "a piece of software" or "a program" or "a software system."

You cannot have "one information, one music, one software" -- those words are mass nouns, or can be used as adjectives.

kstrauser
0 replies
20h34m

And yet we all knew exactly, unambiguously, what they meant.

hakdbha
1 replies
18h42m

I really want this in VR.

CobrastanJorji
0 replies
10h9m
eric_khun
1 replies
14h2m

For Oculus Quest 2/3 app owner: there was been an alpha version released recently: https://stellarium-labs.com/stellarium-vr/

disago
0 replies
13h10m

Thank you for this. I just installed it an it was exactly what I looked for when I bought my Oculus: the opportunity to explore, zoom and learn about the night sky freely in 3d. I tried many others but this has been the only one to fill my expectations.

whatshisface
0 replies
1d1h

I have never managed to get the atmospheric model to reflect what was visible at more than one zoom level. I think it's because they increase your light gathering power as you zoom in, as if you were switching to a bigger telescope to improve your aperture limitation, while in reality you usually zoom by changing lenses that keep the lowest visible magnitude the same.

the-mitr
0 replies
10h37m

I used stellarium to teach some aspects of astronomy that are usually overlooked to young children.

Some of the icebreaker questions:

Does the moon set? Do stars rise and set?

samstave
0 replies
23h28m

I just realized that I need to make a Stellarium Wall art screen that has a stellarium in the background - and daily widget info in front.... !

roschdal
0 replies
20h3m

WebGl port of this please.

peter_d_sherman
0 replies
1d1h

The future Star Trek Enterprise's interplanetary navigation computer subsystem!

(Version 0.00000001 of it, that is! <g> :-) <g>)

kavaruka
0 replies
23h40m

My high school in italy has a planetarium built with stellarium. I had a lot of fun with it as a kid

joshcsimmons
0 replies
16h6m

Readme needs images

jasonincanada
0 replies
22h35m

I wrote a few scripts to help people study the orbits of the first five planets and moons with Stellarium. Here's one that is supposed to simulate a TV station that is on an hourly loop (it uses your computer clock to decide what should be showing at any minute of the hour)

https://github.com/jasonincanada/stellarium-scripts/blob/mas...

intrasight
0 replies
20h14m

I'm excited about the VR version

https://stellarium-labs.com/stellarium-vr/

imhoguy
0 replies
8h31m

Wait, does it show Starlink trains?

idatum
0 replies
1d

I've been using XEphem 4.1 on Win11 using WSLg and it works well. But I noticed a Windows installation is available of Stellarium -- I'll give it a try.

fbhabbed
0 replies
1d2h

There's even a web version linked at https://stellarium.org/

dang
0 replies
19h7m

Related:

Stellarium 1.0 - https://news.ycombinator.com/item?id=33050270 - Oct 2022 (54 comments)

Stellarium v.022 Released - https://news.ycombinator.com/item?id=30820367 - March 2022 (4 comments)

Stellarium - https://news.ycombinator.com/item?id=30574809 - March 2022 (31 comments)

Stellarium: A free open-source planetarium for your computer - https://news.ycombinator.com/item?id=20901358 - Sept 2019 (56 comments)

Stellarium 0.19 - https://news.ycombinator.com/item?id=19513222 - March 2019 (33 comments)

Stellarium Web: Online Planetarium - https://news.ycombinator.com/item?id=17906113 - Sept 2018 (48 comments)

brnt
0 replies
1d

Back in 2006, this is how I did the 'observations' for my astronomy 1 homework.

brandonjm
0 replies
19h7m

I remember going to a planetarium at the local university while in school some 15 years ago. They told us how they use Stellarium to create the skies and Celestia (https://celestiaproject.space/) to create scripted tours for their exhibits. Both were compatible with the hemispherical projector they used.

As soon as I went home I downloaded them both and spent hours visiting stars in Celestia and exploring the sky in Stellarium. It’s great to see they are still quite active.

bookofjoe
0 replies
15h34m

Here's the hardware: https://www.artificialsky.tech/

_joel
0 replies
1d1h

I don't generally use apps on my phone but this one is a must.