
Modrinth · Minecraft mod
Spyglass Astronomy
Draw your own constellations on an interactive and improved night sky. An immersive overhaul of the space skybox, including planets and better stars.
Quick answer
Which Spyglass Astronomy release should I use?
Spyglass Astronomy 1.0.25-mc26.1.2 targets 26.1.2 with Fabric. It must be installed on the client. Do not install it on the dedicated server. All 1 required mods have matching files.
Where it goes
Is Spyglass Astronomy required on the client, server, or both?
It must be installed on the client. Do not install it on the dedicated server.
This file is marked client-only.
What else does Spyglass Astronomy 1.0.25-mc26.1.2 need?
1.0.25-mc26.1.2. Change the file and its required mods may change too.
Install Fabric API first. We found matching files for this game-version and loader setup. 4 come through another mod in the chain.
4 extra mods were pulled in by other dependencies. Indented rows show who needs each one. We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Spyglass Astronomy without breaking your instance.
Built for Spyglass Astronomy 1.0.25-mc26.1.2. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 1.0.25-mc26.1.2. It targets 26.1.2 with Fabric; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install Fabric API first. We found matching files for this game-version and loader setup. 4 come through another mod in the chain.
- 03
Put it on the correct side
It must be installed on the client. Do not install it on the dedicated server.
- 04
Pick the file you checked
Use the “Get this file” button beside 1.0.25-mc26.1.2. It opens that exact file at the source.
About this project
What does Spyglass Astronomy add?
Spyglass Astronomy
Explore a procedurally generated solar system through the lens of a spyglass!
The mod is entirely client-side and designed for helping with world-building and immersion, it is encouraged you think of lore about all the constellations you draw and planets you name!
Planets and stars will be the same for all players on a particular world, and are generated randomly (and largely scientifically accurately) per world, and you can easily share constellations between players using a client-side command
The scientific accuracy means the underlying physics of astrology (orbital resonance, alignments, etc) work exactly the same, you just have to spot them and make up your own lore!

Dependencies:
- Fabric API (or the Quilt equivalent, although i have not tested this mod with Quilt)
How to use
To interact with the cosmos there are three spyglass modes: vanilla, constellation (amethyst), and star (emerald), these are cycled with the pick block button (middle click) while zoomed in.
Constellation mode allows you to draw constellations by holding the attack button (left click) and drawing between stars, as well as being able to select constellations
Star mode allows you to select stars and planets, note that comets are referred to as planets when using commands
Once an object is selected you can name it with /sga:name <name>, or get useful information with /sga:info, you can also get the information of a specific object without selecting it by following the suggestions after typing /sga:info <x>
If you're playing on a multiplayer server, you can use /sga:share or /sga:share <x> to share the currently selected or specified object respectively, this gives you a code you can send in chat or /message to someone directly, which allows them to easily add a constellation or name of a planet or star on their side, provided they have the mod too, of course. For an even smoother experience, you can use Spyglass Astronomy Sync, although that needs to be on the server too
All the client-side commands can be seen by looking at the suggestions after typing /sga:, or by looking at the list on the github readme
There is also a client+server mod that allows for bulk sharing, it's made by someone else, but it looks good!
Compatibility
You can use the mod with Cosmos to have its star rendering, and most of its customisability. I recommend increasing the star count with /sga:admin starCount <...>, since Cosmos looks nice with denser stars, but beware as anyone else youre playing with on that world will need to do it too if you want to be synced
If you want to use shaders, I recommend Complementary with Euphoria Patches, which has proper support for the colors of the stars and planets
Older versions of Spyglass Astronomy are incompatible with the mod Spyglass Improvements, however Spyglass Astronomy comes with its own scrollable spyglass zoom, and other mods, like Zoomglass, exist to allow for spyglass hotkeys
Project description from Modrinth.
Pick your setup
Spyglass Astronomy by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.2
1 loader build26.1.2
1 loader build26.1.1
1 loader build26.1
1 loader build1.21.11
1 loader build1.21.10
1 loader build1.21.9
1 loader build1.21.8
1 loader build1.21.7
1 loader build1.21.6
1 loader build1.21.5
1 loader build1.21.4
1 loader buildShowing the newest 12 of 28 game versions. Older files are in the list below.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Spyglass Astronomy versions and loaders
1.0.25-mc26.1.2
spyglass_astronomy-1.0.25-mc26.1.2.jar
15 Aug 2026
1.0.25-mc26.2
spyglass_astronomy-1.0.25-mc26.2.jar
26 Jul 2026
1.0.24-mc26.2
spyglass_astronomy-1.0.24-mc26.2.jar
21 Jul 2026
1.0.23-mc26.2
spyglass_astronomy-1.0.23-mc26.2.jar
15 Jul 2026
1.0.22-mc26.2
spyglass_astronomy-1.0.22-mc26.2.jar
14 Jul 2026
1.0.21-mc26.2
spyglass_astronomy-1.0.21-mc26.2.jar
14 Jul 2026
1.0.20-mc26.2
spyglass_astronomy-1.0.20-mc26.2.jar
10 Jul 2026
1.0.20-mc26.1.1
spyglass_astronomy-1.0.20-mc26.1.1.jar
11 Apr 2026
1.0.20-mc1.21.11
spyglass_astronomy-1.0.20-mc1.21.11.jar
23 Dec 2025
1.0.20-mc1.21.9
spyglass_astronomy-1.0.20-mc1.21.9.jar
23 Dec 2025
1.0.19-mc1.21.9
spyglass_astronomy-1.0.19-mc1.21.9.jar
2 Oct 2025
1.0.19-mc1.21.6
spyglass_astronomy-1.0.19-mc1.21.6.jar
29 Sept 2025
Looking for an older file? The official Modrinth project page is in Resources.