Sources and licenses

Credits

Hyperbolic is built on public science. These are the sources of its imagery, data, type and code, as listed in the game under Settings → SOURCES AND LICENSES.

Imagery and data

Earth imagery: NASA Earth Observatory, Blue Marble Next Generation (Reto Stöckli, NASA GSFC); Black Marble 2016 (Joshua Stevens, using Suomi NPP VIIRS data from Miguel Román, NASA GSFC); Blue Marble clouds (Reto Stöckli, NASA GSFC).
Earth relief: GEBCO_08 Grid, GEBCO Compilation Group, via NASA Earth Observatory.
Coastlines: Made with Natural Earth.
Moon: NASA's Scientific Visualization Studio, CGI Moon Kit (Ernie Wright), from LRO LROC WAC and LOLA data.
Saturn and ring textures: Solar System Scope, licensed under CC BY 4.0, modified (resized; tinted and shaded in the game). Used for Saturn and its rings in the Saturn level.
Mars: Viking MDIM 2.1 colorized global mosaic, NASA Ames / USGS Astrogeology Science Center; MGS MOLA elevation (463 m DEM), MOLA Science Team, NASA GSFC / USGS Astrogeology Science Center. Public domain; resized and cropped.
Io: Galileo SSI / Voyager color merged global mosaic, USGS Astrogeology Science Center (NASA Galileo and Voyager data). Public domain; resized.
Jupiter: Cassini global map, PIA07782, NASA/JPL/Space Science Institute. Resized.
References: the Mars sunset after Curiosity's images (NASA/JPL-Caltech/MSSS/Texas A&M Univ., PIA19400); Io's plumes after Galileo, Cassini and New Horizons observations. The skies, plumes, dust and lava are drawn by the game.

The sky

Planet positions: approximate formulae, courtesy NASA/JPL-Caltech (Keplerian elements by E.M. Standish, JPL Solar System Dynamics, Approximate Positions of the Major Planets).
Sun and Moon positions: low-precision formulae from The Astronomical Almanac.
Body orientations: IAU Working Group on Cartographic Coordinates and Rotational Elements (Archinal et al. 2018).
Io's position: the largest periodic term of its longitude after J. Meeus, Astronomical Algorithms (2nd ed.), ch. 44; checked against JPL Horizons.

NASA and JPL material is used as a courtesy source credit; it does not imply NASA or JPL endorsement of this game. The game does not use the NASA insignia, logotype or seal. GEBCO data is used under the GEBCO terms of use, which imply no endorsement by GEBCO, IHO or IOC. Natural Earth data is in the public domain.

Typefaces

Michroma, Copyright 2011 The Michroma Project Authors, SIL Open Font License 1.1. Used in the game and on this site (license).
Inter, Copyright 2020 The Inter Project Authors, SIL Open Font License 1.1. Used on this site (license).

Code

Game Center: Apple Unity Plug-ins (Apple.Core, Apple.GameKit), Copyright Apple Inc., Apache License 2.0.

Music and sound

This site

Images on this site are captures from the game. Apple, the Apple logo, App Store, Game Center, Apple Music, iCloud, iPhone and iPad are trademarks of Apple Inc., registered in the U.S. and other countries.