Ruprecht-Karls-Universität Heidelberg


(January 11, 2019) Current version: 2.1.7

Gaia Sky 2.1.0+ can automatically download the base data and data packages. If the program crashes, just delete your $HOME/.gaiasky folder.

System Package MD5
Linux DEB package (64 MB)
RPM package (64 MB)
Linux/Unix installer (65M MB)
AUR package - gaiasky
Windows 64-bit installer (111 MB)
32-bit installer (106 MB)
macOS DMG package (136 MB) 133d4936651d3e5b7e87010ea6d0de14
Archive file TAR.GZ archive file (63 MB) c3e13be24d29189d869f9886549ab613
GIT repository Source code

Installation instructions

Windows installer

Download the installer and double-click on it. Follow the on-screen instructions. In Windows 8/10 SmartScreen may block the installation. If so, just click on More info and then on Run anyway.

macOS installer

Download and run the DMG file. Then follow the installer instructions.

TGZ installation

Uncompress the archive in POSIX systems using:

$ tar -zxvf gaiasky-[version].tar.gz

DEB package

Run the following in a terminal:

$ dpkg -i gaiasky-[version].deb

RPM package

Run the following in a terminal:

$ rpm -ivh --nodigest gaiasky-[version].rpm

AUR package

Use any tool capable of installing packages from AUR. The package name is gaiasky. For example, with yay:

$ yay -S gaiasky

Additional Gaia DR2 catalogs (version 2.1.0+)

Latest update: 2018/11/27

Here you can find larger catalogs for download, based on Gaia DR2 data. The 'criteria' column contains the two selection criteria used in the catalog, for bright (gmag <= 13) and faint (gmag > 13) stars in parallax relative error.

These catalogs can also be downloaded directly with the download manager from within Gaia Sky, or manually via these server pages.

Download the desired catalog and extract it into your data folder (usually $HOME/.gaiasky/data). That's it, you are done!


Data Criteria Number of stars Size (compressed)
Very small 5% / 0.5% 5.1 million
519 MB
  A very small dataset. Scanning underdensities are clearly visible due to the very strict bright star criterion (10%). Otherwise, a good dataset to explore without filling up your disk.
Small 10% / 0.5% 6.7 million
686 MB
  A reasonably small dataset. Some scanning underdensities are present due to the strict bright star criterion (10%).
Default 20% / 0.5% 7.5 million
768 MB
  The default dataset, included with the Gaia Sky download. The catalog is a trade-off between number of stars and size. Contains bright stars with parallaxes up to 20% relative error, and faint stars with 0.5% relative error.
Bright 90% / 0% 7.7 million
786 MB
  Contains only bright stars with parallax relative errors up to 90%. No faint stars (gmag > 13) are included.
Large 50% / 12.5% 97 million
9,1 GB
  This is the default large dataset. Contains about a hundred million stars, with a 50% relative error for bright stars and 12.5% for faint stars.
Rather large 50% / 50% 400 million
37 GB
  This is a rather large dataset. Contains four hundred million stars, up to 50% parallax relative error.
Very large 90% / 90% 601 million
47 GB
  Lots of stars (601 million) in this dataset. Parallax criteria are very relaxed, at 90% relative error for both bright and faint stars.
Extra large Bayesian distances 1.33 billion
53 GB
  Catalog with 1.33 billion stars (all 5-parameter sources in DR2) based on the bayesian distances paper by Bailer-Jones et al.. We are still working on getting a good artifact-free LOD structure with this catalog, so bear in mind this is not the final product.

Isosurface maps

Here you can find additional isosurface maps produced by Galaxy Map ready to use with Gaia Sky. Just extract the packages in your data folder (usually $HOME/.gaiasky/data).

File Description Size
Very ionizing Very ionizing hot stars 15 MB
Some ionizing Some ionizing hot stars 16 MB
Non-ionizing Non-ionizing hot stars 18 MB
Non-medium-ionizing Non-medium-ionizing hot stars 33 MB

High resolution texture packs

The installation packages do not include high resolution textures to keep the file size at bay. However, we offer a high resolution texture pack with 4K and 8K textures which must be extracted in $GAIASKY_INSTALL_DIR/data/tex (versions previous to 2.1.0) or your data folder (for versions 2.1.0+, usually $HOME/.gaiasky/data).

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