Last updated: November 1, 2026
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StarTeller is built on the generous work of the open-data and open-source astronomy community. This page credits the third-party data and imagery used in the app and reproduces the licenses that require it. StarTeller is not endorsed by or affiliated with any of the projects, institutions, or authors listed below.
Deep-sky object positions and data come from a modified version of the OpenNGC database. The modified catalog is shared under the same CC BY-SA 4.0 license.
The sky map's star field, star names, and designations are from the d3-celestial project, derived from the Hipparcos and Tycho catalogs and Stellarium sky cultures.
Copyright (c) 2015, Olaf Frohn All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Deep-sky object images are from the DSS color survey, accessed through the ALASKY database at the Centre de Données astronomiques de Strasbourg (CDS). The Digitized Sky Surveys were produced at the Space Telescope Science Institute under U.S. Government grant NAG W-2166. The images are based on photographic data obtained using the Oschin Schmidt Telescope on Palomar Mountain and the UK Schmidt Telescope.
The sky map's Milky Way background is StarTeller's own starless rendering, built from Gaia DR3 star counts, colored to match the ESO/S. Brunier Milky Way panorama, with hydrogen-alpha glow from the Finkbeiner full-sky Hα map. The rendering is shared under CC BY-SA 4.0.
This work has made use of data from the European Space Agency (ESA) mission Gaia, processed by the Gaia Data Processing and Analysis Consortium (DPAC). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement.
The Moon's surface color and relief come from the CGI Moon Kit, built from Lunar Reconnaissance Orbiter Camera (LROC) imagery and Lunar Orbiter Laser Altimeter (LOLA) elevation data, resized and reformatted for use in the app.
The sky map's atmosphere builds on the physical scattering model from Fernando García Liñán's spectral sky shader. Twilight, the night sky, eclipses, and the rendering pipeline around it were developed for StarTeller.
Copyright (c) 2023 Fernando García Liñán Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Planet and Saturn-ring texture maps are from Solar System Scope, resized and reformatted for use in the app.
Preview photos for Europa, Ganymede, Ariel, and Callisto in the moon search and detail views use processed spacecraft imagery shared under Creative Commons licenses.
Positions, rise/set times, and visibility windows are computed on your device by the StarTeller astronomy engine, based on the open-source StarTeller-CLI.