EDIT: AFTER OPTIMIZATION I WAS ABLE TO SMOOTHLY RUN OVER 5000 STARS INGAME and with low FPS 50K - IT MAY BE POSSIBLE TO DO THIS INGAME WITH A BETTER PC

Want to know some stats: No? Well. I am telling you anyway. You don't get a say.
This is a render that took half a minute, the stats in the bottom corner are not real i doctored the image don't actually expect to run this unless you have a threadripper

One million procedurally generated star systems all with 5-10 planets and each planet with 1-4 moons. Planets was softcapped. Record planet count in a system was 16.

Average nearest-neighbor distance: ~7,645 AU (0.12 light-years ish)

Median: ~7,180 AU

Closest pair anywhere: ~18 AU apart (closer than Neptune is to our Sun), it was two 5 planet systems with minimal planet distances.

Sparsest pair: ~46,500 AU apart. Two very large systems, two 14 planet systems with a wildly eccentric last planet pushed them away

For context: Proxima Centauri is ~4.2 ly from the Sun. So on average, procedural neighbors are packed ~35x tighter than our nearest real star.

Forced-purple stars: 16.02% empirical vs 16% designed. I purposely made more of them generate bright purple than anything else for NO particular reason.

The other 84% roll random color as usual no bias

Edit: Right after i posted this some guy made a fork which adds literally almost every feature from main sfs and overhauls the entire game. Sooooo... lol

Q: Doesnt this break rule 6?
A: No. That rule goes for like, 5 posts of the same exact mission. This is a single, final post due to massive updates for atleast this week. Plus i'm hiding the original post.

OG: https://www.reddit.com/r/SpaceflightSimulator/comments/1vjevli/i_made_spaceflight_simulator_in_a_single_html/ .

https://github.com/CatPrinceHQ2/SpaceflightSimulatorInHTML

The game has been majorly overhauled, pretty much rewrote the entire thing today. Plays very much like normal SFS.

All planets have colored orbits, moons are added, orbits are no longer just big circles, they have shapes!! The code's ready for me to add the Alpha Centauri system soon.

The only thing left to do is give this thing ultra-moddability with mod files downloadable for custom systems or parts just like in Normal SFS. Which i will work on. I hope you enjoy it.

https://github.com/CatPrinceHQ2/SpaceflightSimulatorInHTML/tree/main

It's pretty straightforward except its 3,600 lines of code so its not straight forward. Uh... read the readme, ok?

Basically a crap version of SFS for Google Chrome. I hope you like it. I'll update this so leave suggestions. Thanks

I dunno bro. It works i guess.

The rules of the art project (as my teacher instructed)

1. Any means of creation in-game are allowed within reason as the entire building process is recorded and AI is not used.

2. The entire project creation process must be recorded start to finish (ended up with several gigabytes of video, lol)

3. NO outside help is allowed.

4. Time limit: 1 week, 2 days (expected to finish in 1 week. the extra two days are for issues)

5. Project is worth 10% of the semester grade (100PT).
   Score given by teacher: 97%

Info: 256 chunk render distance via Voxy Mod (Distant Horizons is really bad! Not recommended!)

This was built legitimately. By legitimately, i mean specifically no world editing whatsoever. However, i did use blueprint mods (Litematica) and item dupes. I spent 6-8 hours a day on it for around 4-5 months toward the end of 2025. I know you won't believe me, people, so if need be i can show progress screenshots and hours of video. This was genuinely made in survival. See statistics.

There are no known bugs other than long notes seeming unhit after release. They are not. You still get your score. No, you are not missing notes. I dont know how to fix it. I tried, im sorry!

This is free to use, and free to distribute, but you ARE NOT allowed to modify it. The code is obfuscated to deter you from attempting to. This is to prevent people from redistributing it under their name and taking the credit. GG.