Use it, credit it
Credit and contact
Open Overwatch is free to use, read, fork and build on under the MIT licence. All that is asked is that the copyright line stays with the code. If you write about it, teach with it or build on it, please credit it like this:
Jones, D. (2026). Open Overwatch [Computer software]. https://github.com/destinjones/open-overwatch
The repository has a CITATION.cff, so GitHub's “Cite this repository” button gives the same reference in BibTeX and APA. The data and artwork in the project belong to their sources and keep their own licences (NASA, NOAA, USGS, OpenStreetMap, Wikidata and others); they are all listed on the site and in the repository.
Two sky datasets carry their own terms. The light pollution map is from Falchi et al. 2016, The New World Atlas of Artificial Night Sky Brightness (paper), under CC BY-NC 4.0: it may be used for non-commercial purposes only, so a paid or ad-funded fork must leave it out. The deep-sky catalogue is derived from OpenNGC by Mattia Verga and contributors, under CC BY-SA 4.0.