Cosmos
by Hollowed
Cosmos changes the night sky of a Fabric world, adding configurable celestial points that can be shaped, colored and made brighter or dimmer.
What it does
Players who want a more detailed night sky can adjust Cosmos to set how many celestial points appear and how bright they are. Settings cover a brightness multiplier, a size range, the rate at which points twinkle, a list of colors and a range of opacity. A north marker can be switched on or off, and when it is enabled it takes the place of a set number of the lowest points, so it stays visible even at the lowest counts.
Only the client needs the mod, so a player can add it to a vanilla or modded server without the server installing anything. Cosmos requires Fabric API and MidnightLib, and both must be installed beside it. The mod is published for Fabric alone, across nine release versions 1.21.8 – 26.3, and the code is not released as open source; all rights are reserved, though the source code and issue tracker are linked publicly.
Key features
Brightness multiplier
A multiplier scales how bright every point is, from faint to strong, without changing the sky's other colors.
Point size and twinkle
A size range sets the span of point sizes, and a twinkle frequency controls how often points flicker.
Color list and opacity
Points can be drawn from a list of colors, with an alpha range that sets how opaque each point is.
North marker option
A toggle turns the north marker on or off, and it can still appear when the option is turned off.
Gallery
Compatibility
Latest build for each game version and loader.
26.x5 of 5 versions with builds
1.21.x4 of 4 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 2
Use cases
Night sky for a build
Someone building a night scene can tune point count and color to suit a particular look.
Quiet or bright skies
Players who want fewer points can lower the count, while those who want a busy sky can raise brightness and size.
Who it’s for: Players who want to tune the night sky on a Fabric client, and builders who need a specific sky look for a scene. Server owners need nothing extra, since only the client runs the mod.
How it compares
Polestar is a Fabric mod for 26.2 under the MIT License, not open source, and it runs on the client alone. Spyglass Astronomy is a Fabric mod for 1.19 – 26.3 under the GNU Lesser General Public License v3.0 only, open source, also client-side only. Cosmos covers 1.21.8 – 26.3 with no other loader, so Forge players are not served by it.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Cosmos | Fabric | 1.21.8 – 26.3 | Client-side only | 2026-09-23 |
| Polestar | Fabric | 26.2 | Client-side only | 2026-09-07 |
| Spyglass Astronomy | Fabric | 1.19 – 26.3 | Client-side only | 2026-09-23 |
Questions
Does Cosmos need Fabric API?
Does Cosmos have to be installed on the server?
Which game versions does Cosmos support?
In the catalog
Cosmos is one of 12,078 Decoration mods on ModsFinder, and one of 6,982 Decoration mods for Fabric. 8,071 mods support Minecraft 26.3.
More from Hollowed
Similar mods
What the author says
*While the north star picks a northern star to replace, if the count is low enough to where there are no northern stars there is a possibility that no north star will appear even with the option turned on
Official listing
- Modrinth page
- modrinth.com/mod/cosmos-mod
- Owner
- Hollowed
- Published
- 2025-09-05
- Updated on Modrinth
- 2026-09-23
- Facts verified
- 2026-10-15