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Galileo Wiki

Galileo is a cross-platform astrophotography imaging application for Windows, macOS, Linux and Raspberry Pi, built on INDI and ASCOM Alpaca. It supports a mix of INDI and Alpaca devices, multiple piers per observatory, and multiple optical tubes and cameras per mount.

Galileo is pre-alpha. It runs today, but some screens are still placeholders. The README lists what is built.

Installing: download the installer for your system (Windows .exe, macOS .dmg, Linux/Raspberry Pi .AppImage) from the Releases page. See the Getting Started Guide for details and the install-from-source alternative.

Articles

Setup

Article	What it covers
01. Getting Started Guide	Installing Galileo, creating your Observatory and Pier, connecting equipment, and taking your first exposure.
02. Installing INDI	Installing an INDI server on macOS, Linux, and Raspberry Pi.
03. Installing an ASCOM Alpaca Bridge	Bridging Windows ASCOM/COM drivers onto the network as Alpaca devices using ASCOM Remote.

New here? Start with the Getting Started Guide.

Help is built in. This wiki is the overview; Galileo itself explains every control. Click the ? beside a screen's title, press F1, or hover any control. See Built-in Help.

User Manual

Article	What it covers
04. Star Atlas	Live planetarium view, finding and selecting objects, horizon overlay, mount reticle.
05. Planning	What's Up Tonight rankings, the deep-sky catalog, session authoring with blocks, the multi-night schedule calendar, and per-session quality history, plus the multi-Pier Dashboard.
06. Imaging	Live capture and preview, capture settings, histogram, live stacking, the Flats Assistant, and saving to the Library.
07. Focus	Automated autofocus, the HFR V-curve, and manual focuser control.
08. Guiding	Connecting to PHD2, guide graph, drift and calibration plots, dithering.
09. Plate Solving	Capture-and-solve, load-and-solve, sync and slew-to-target actions, ASTAP setup.
10. Library	Image catalog, sessions, mappings, duplicate detection, object merging, and cloud backup.
11. Equipment	Camera, mount, filter wheel, focuser, rotator, optics, switches, flat panel, weather, dome and safety monitor.
12. Science — Variable Stars	AAVSO variable-star planning, aperture photometry, and submitting observations.
14. Built-in Help	The ? button, F1, point-and-click help and hover text — detailed help for every control, offline, plus how to ask the community and report a problem.
15. Options	The settings pages: horizon, planning, imaging, focus and solver defaults, Library, plugins.

Developer Guide

Article	What it covers
13. Plugin Developers Guide	Registering a device backend, sequencer instruction, or UI panel; the `PluginContext` service surface; VSTarget as a worked reference implementation.

Elsewhere in the project

Resource	What it is
README	Project overview, current status, screenshots and planned capabilities.
Design documents	Scope (PSD), requirements (SRS), architecture (SDD) and traceability (RTM).
Changelog	What has changed, newest first.
Contributing	Development setup, test conventions and the Contributor License Agreement.
Discord	Community support: ask questions and get help from other users.
Issues	Report a bug or request a feature.