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Credits & technologies

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Astraema relies on the wonderful work of many developers and contributors who share their creations as open source or open access. This page pays tribute to them and gathers all the technical attributions required by their respective licenses.

🌌 Astrological calculations

Swiss Ephemeris™

The planetary positions, ephemerides and astronomical calculations used by Astraema are calculated with Swiss Ephemeris™ Professional Edition.

Astraema calls the Swiss Ephemeris library directly, without any third-party bridge. The interface connecting Astraema to this library was developed specifically for the site.

License: Swiss Ephemeris™ Professional License.

🌍 Geographic data

GeoNames

The city names, geographic coordinates and time zones used to calculate charts come from the GeoNames geographic database. Astraema keeps a local copy to respond instantly, and queries the online service when a place is not in it.

Data © GeoNames — used under the Creative Commons Attribution (CC BY 4.0) license.

OpenStreetMap & Nominatim

When GeoNames cannot find a place, Astraema also queries Nominatim, the geocoding service of OpenStreetMap.

Data © OpenStreetMap contributors — available under the Open Database License (ODbL).

tzdata (IANA Time Zone Database)

The time zones used to place a birth time rely on the IANA Time Zone Database (tzdata), an open database maintained by IANA. Accessed through Python's standard zoneinfo module.

Public domain — free to use.

🐍 Python libraries (server side)

Flask

Flask, the web micro-framework that runs Astraema.
© Pallets — BSD-3-Clause License.

Jinja

Jinja, the template engine used to generate the HTML pages.
© Pallets — BSD-3-Clause License.

Werkzeug

Werkzeug, a WSGI utility used in particular to secure passwords.
© Pallets — BSD-3-Clause License.

Flask-WTF

Flask-WTF, which provides protection against cross-site request forgery (CSRF).
© Pallets Community — BSD-3-Clause License.

timezonefinder

timezonefinder, which determines a place's time zone offline from its coordinates. The time zone boundaries it uses are derived from OpenStreetMap data.
© Jannik Michelfeit — MIT License.

Gunicorn

Gunicorn, the server that runs Astraema online.
© Benoit Chesneau — MIT License.

Requests

Requests, an elegant HTTP library.
© Kenneth Reitz — Apache-2.0 License.

Python

The Python language and its standard library, on which everything else is built.
© Python Software Foundation — PSF License.

✏️ Fonts

Astraema (glyph font)

The Astraema.otf astrological glyph font, used to display the symbols of the planets, signs and sensitive points, was created specifically for Astraema. All rights reserved.

Open fonts hosted by Astraema

Four interface fonts are used, each under the SIL Open Font License (OFL 1.1). They are hosted directly by Astraema: they are not loaded from an external server, and no visit data is sent to a third party to display them.

The full text of the four licenses accompanies the font files, as the OFL license requires.

🎧 Music

Music production: GarageBand (Apple). Some arrangements may include Apple Loops used in accordance with their license.

🖋️ Astraema's own texts and visuals

Astraema's own creations — texts, visuals, glyphs, visual identity — and the rules that apply to their use are set out in the Legal Notice.

🙏 Thanks

Astraema would not exist without the worldwide open source community. Every shared line of code, every open font, every open database is a gift that makes projects like this one possible.

Thank you to all the developers, designers, maintainers and contributors, named or anonymous, who make the web freer and more creative. ✨

📝 Updates to this page

This list is kept as up to date as possible. If you spot an omission or an attribution error, please write to us at contact@astraema.com.