Last updated: June 13, 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 was rendered with bsrender from the Gaia EDR3 star catalog, with foreground stars removed. The image has been resized and reformatted for use in the app and is shared under CC BY-SA 4.0.
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.