Ruprecht-Karls-Universität Heidelberg


(July 6, 2018) Current version: 2.0.2

Gaia Sky 2.0.2 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 (959 MB)
RPM package (959 MB)
Linux/Unix installer (954 MB)
AUR package - gaiasky
Windows 64-bit installer (998 MB)
32-bit installer (994 MB)
macOS DMG package (1.0 GB) efcc058085cedf5ce22f82ecd167fbe5
Archive file TAR.GZ archive file (960 MB) 9109c464844ccdd92ed585024fdce7eb
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:

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 (version 2.0.1+)

Latest update: 2018/06/26

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
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
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
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
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
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
51 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.
Extra large Bayesian distances 1.33 billion
67 GB catalog-dr2-verylarge.json
This catalog is still in beta and offered only as a preview. 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 the isosurface maps produced by Galaxy Map ready to use with Gaia Sky.

Catalog descriptor Size Mesh file
meshes-dr2-dust.json 2 MB Dust 15%
Dust isosurface for the 15% density level
1.7 MB Dust 60%
Dust isosurface for the 60% density level
meshes-dr2-hii.json 3 MB HII
HII regions, clouds of partially ionized gas
meshes-dr2-hot-very.json 9.8 MB Very ionizing peaks
Very ionizing peaks of hot stars
9.2 MB Very ionizing ranges
Very ionizing ranges of hot stars
meshes-dr2-hot-some.json 8.6 MB Some ionizing peaks
Some ionizing peaks of hot stars
11 MB Some ionizing ranges
Some ionizing ranges of hot stars
meshes-dr2-hot-none.json 13 MB Non ionizing peaks ge50
Non ionizing peaks of hot stars
11 MB Non ionizing ranges ge50
Non ionizing ranges of hot stars
meshes-dr2-hot-none-medium.json 19 MB Non ionizing peaks ge25 lt50
Non ionizing peaks of hot stars
23 MB Non ionizing ranges ge25 lt50
Non ionizing ranges of hot 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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