ModsFinder

Spyglass Astronomy

by Nettakrim

Spyglass Astronomy turns the night sky into a surface players can draw on, naming and linking the celestial bodies of each world.

FabricClient-side onlyGNU Lesser General Public License v3.0 onlyOpen source1.19 – 26.3

What it does

Celestial bodies are generated per world and are the same for every player on that world, with positions that follow largely scientific rules. Players draw their own constellations over the sky with a spyglass mode, select objects, and name them with commands. The sky also gets a broader overhaul with planets and denser, improved points of light, and the mod is aimed at world-building and roleplay rather than gameplay rewards.

Three spyglass modes are cycled with the middle mouse button while zoomed in: vanilla, constellation mode drawn with the amethyst icon, and object mode drawn with the emerald icon. Commands such as /sga:name, /sga:info and /sga:share work on a selected or specified object, and /sga:share produces a code that another player with the mod can enter to add the same constellation or name. Spyglass Astronomy Sync can carry this exchange further, but it needs to be installed on the server as well.

The mod is client-side only, so a server does not need it and players join without installing anything on the server side. It requires Fabric API, and it is open source under the GNU Lesser General Public License v3.0 only. Builds exist for 1.19 – 26.3, and the latest Fabric file is 1.0.27-mc26.3 for 26.3, published 2026-09-23.

Key features

  1. Constellation drawing

    Holding the attack button in constellation mode draws lines between points of light, and existing constellations can be selected.

  2. Object selection

    Object mode selects celestial bodies, where comets are handled as planets in commands.

  3. Naming and information commands

    /sga:name assigns a name to a selected object, and /sga:info shows details, including for objects picked from command suggestions.

  4. Constellation sharing

    /sga:share creates a code that can be sent in chat or private messages so another player can add the same constellation or name.

  5. Cosmos rendering

    With the optional Cosmos mod, its rendering and most of its settings apply, and a higher starCount through /sga:admin gives denser skies.

Compatibility

Latest build for each game version and loader.

26.x5 of 5 versions with builds
26.31.0.27-mc26.3
26.21.0.27-mc26.2
26.1.21.0.27-mc26.1.2
26.1.11.0.20-mc26.1.1
26.11.0.20-mc26.1.1
1.21.x12 of 12 versions with builds
1.21.111.0.20-mc1.21.11
1.21.101.0.20-mc1.21.9
1.21.91.0.20-mc1.21.9
1.21.81.0.19-mc1.21.6
1.21.71.0.19-mc1.21.6
1.21.61.0.19-mc1.21.6
1.21.51.0.16-mc1.21.5
1.21.41.0.15-mc1.21.4
1.21.31.0.15-mc1.21.2+
1.21.21.0.15-mc1.21.2+
1.21.11.0.13
1.211.0.13
1.20.x7 of 7 versions with builds
1.19.x5 of 5 versions with builds
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Requirements

Dependencies declared by the latest file for each loader.

Required 1

Fabric APILightweight and modular API providing common hooks and intercompatibility measures utilized by mods using the Fabric toolchain.
Required

Optional 2

CosmosA highly configurable mod for better stars and night sky!
Optional
Spyglass Astronomy SyncMultiplayer support for Spyglass Astronomy
Optional

Required by 2 mods

Spyglass Astronomy Sync1.21 – 26.3Almanac for Spyglass Astronomy (Fixed)1.20.1

How it compares

Full comparison

Astrocraft is a Fabric and Quilt mod for 1.20.1 – 1.21.4, client-side only, and it is not open source under the MIT License. Spyglass Only HUD is client-side only, open source under the MIT License, and covers 1.20.1 – 26.3 on Fabric. Spyglass Zoom (Updated) is client-side only, open source under the GNU General Public License v3.0 only, and covers 1.20 – 1.21.11 on Fabric.

ModLoadersGame versionsEnvironmentUpdated
Spyglass AstronomyFabric1.19 – 26.3Client-side only2026-09-23
AstrocraftFabric and Quilt1.20.1 – 1.21.4Client-side only2025-05-10
Spyglass Only HUDFabric1.20.1 – 26.3Client-side only2026-10-03
Spyglass Zoom (Updated)Fabric1.20 – 1.21.11Client-side only2025-03-25

Questions

Does Spyglass Astronomy need Fabric API?

Yes. Fabric API is listed as a required dependency, and the mod has no Forge or NeoForge files.

Does the server need Spyglass Astronomy installed?

No. The mod is client-side only, so only the players need it. Spyglass Astronomy Sync is an optional server-side addition for syncing.

Are the celestial bodies the same for everyone on a world?

Yes. Celestial bodies are generated per world and are the same for all players on that world.

In the catalog

Spyglass Astronomy 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.

Decoration mods12,078Fabric modsMods for 26.38,071

More from Nettakrim

All projects
Signed Paintings1.20 – 26.3Plane Advancements1.21 – 26.3Fishing Ruler1.19 – 26.3Souper Secret Settings1.19 – 1.21.11Client Execution1.20 – 26.3Fake AFK1.20 – 26.2

Similar mods

[ETF] Entity Texture Features1.16.5 – 26.3Not Enough Animations1.16.5 – 26.3Continuity1.17.1 – 26.3LambDynamicLights - Dynamic Lights1.16.2 – 26.3Presence Footsteps1.7.10 – 26.3AmbientSounds1.12.2 – 26.3

What the author says

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…
Nettakrim, on the Modrinth page

Official listing

Owner
Nettakrim
Published
2023-01-13
Updated on Modrinth
2026-09-23
Facts verified
2026-10-15

Tags

DecorationAdventureEquipmentGame mechanicsUtility
Open on ModrinthCompare