Acknowledgements

With thanks to the people and the open science that made Cygnus possible.

Community and friends

Cygnus would not exist without the support of many astrologers, diviners, mystics, technicians, artists, and geniuses whose encouragement, ideas, and good company make this work possible.

Special gratitude goes to my dear friends and collaborators Ash, Chloe, Daniel, Hawk, Ione, Janet, Kira, Shuly, and Timothy.

Data and technology

Cygnus stands on open astronomical science and the work of many who shared it freely.

NASA Jet Propulsion Laboratory — the DE-series development ephemerides (DE421 / DE440 / DE441) that supply planetary positions.
Brandon Rhodes' open source work on Skyfield and jplephem, whose core ephemeris handling and processing algorithms our calculation core is derived from.
Robert Corona's Astronomicon, the astrological glyph font that renders Cygnus's planet, sign, and point symbols, used under the SIL Open Font License 1.1.
The Twemoji project (maintained by jdecked), whose swan artwork is the basis of the Cygnus favicon. Used under the Creative Commons Attribution 4.0 License.

And of course, special thanks to astrology itself--the art, craft, science, and spirit that makes it all worth it.