Ruprecht-Karls-Universität Heidelberg


(Apr 25, 2018) Current version: 2.0.0

Gaia Sky 2.0.0 comes by default with a subset of DR2 selected using some criteria on the relative error of parallaxes. The default dataset criteria are 20% for bright stars (gmag ≤ 13) and 0.5% for faint stars (gmag > 13). This yields a catalog of about 7.5 million stars. You can download larger catalogs below.

System Package MD5
Linux DEB package (875 MB)
RPM package (875 MB)
Linux/Unix installer (870 MB)
AUR package - gaiasky
Windows 64-bit installer (909 MB)
32-bit installer (913 MB)
MacOS X DMG package (939 MB) d73f16d094cb3806cf4d282be4813e63
Archive file TAR.GZ archive file (874 MB) dd0be5f32eec2caf1f3066b091f7f409
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. Once the window with the Gaia Sky icon comes up, copy-paste it to your Applications folder. Please, remove any existing Gaia before installing.

TGZ installation

Uncompress the archive in POSIX systems using:

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

DEB package

Run the following in a terminal:

sudo dpkg -i gaiasky-[version].deb

RPM package

Run the following in a terminal:

sudo yum install gaiasky-[version].rpm

AUR package

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

trizen -S gaiasky


Additional Gaia DR2 catalogs

Latest update: 2018/05/18

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. The Default catalog already comes bundled with Gaia Sky.

Download the desired catalog and extract it in the $GAIASKY_INSTALL_DIR/data/octree/dr2/ folder (create if it does not exist), where $GAIASKY_INSTALL_DIR is your Gaia Sky installation folder, not the config folder in the user directory!. Then download the catalog descriptor json file and put it in $GAIASKY_INSTALL_DIR/data. Finally, go to the preferences window in Gaia Sky, choose the new catalog under the Data tab and restart.

Data Criteria Number of stars Size (compressed) Catalog descriptor
Very small 5% / 0.5% 5.1 million (5131441) 519 MB catalog-dr2-verysmall.json
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 (6768167) 686 MB catalog-dr2-small.json
A reasonably small dataset. Some scanning underdensities are present due to the strict bright star criterion (10%).
Default 20% / 0.5% 7.5 million (7574316) 768 MB catalog-dr2-default.json
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 (7742203) 786 MB catalog-dr2-bright.json
Contains only bright stars with parallax relative errors up to 90%. No faint stars (gmag > 13) are included.
Large 50% / 12.5% 97 million (96947939) 9,1 GB catalog-dr2-large.json
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.
Very large 90% / 90% 601 million (601337906) 56 GB catalog-dr2-verylarge.json
Lots of stars (601 million) in this dataset. Parallax criteria are very relaxed, at 90% relative error for both bright and faint stars.

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 download with 4K and 8K textures which must be extracted in $GAIASKY_INSTALL_DIR/data/tex.

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