Credits

Data

• GeoNames

  CC BY 4.0

  Towns, coordinates, and time zones. The file public/data/places.json is derived from the cities5000, admin1, and country tables.

• HYG Database v4.0

  CC BY-SA 4.0

  Star positions, brightness, colour, constellation, and proper names. Compiled by David Nash (astronexus). public/data/stars.json is a filtered extract and stays under CC BY-SA 4.0.

Fonts

• Fraunces

  SIL Open Font License 1.1

  Headlines and several posters. Designed by Undercase Type. The font files are part of this site. The browser does not call Google.

• Outfit

  SIL Open Font License 1.1

  Interface and small labels. Designed by Rodrigo Fuenzalida.

• Cormorant Garamond

  SIL Open Font License 1.1

  Wedding and gallery posters. Designed by Christian Thalmann.

• Nunito

  SIL Open Font License 1.1

  The nursery poster. Designed by Vernon Adams.

• Manrope

  SIL Open Font License 1.1

  Interface and body text. Designed by Mikhail Sharanda. The files are part of this site.

• IBM Plex Mono

  SIL Open Font License 1.1

  Catalogue labels, prices, and step numbers. Designed by IBM.

Libraries

• next

  16.4.0

  MIT

  The site framework. Pages are exported as static files.

• react

  19.3.0

  MIT

  Interface.

• react-dom

  19.3.0

  MIT

  Interface.

• astronomy-engine

  2.1.19

  MIT

  Moon phase and illumination, planet positions, and the rotation from star coordinates to the local sky. The planetary tables travel inside this MIT-licensed package.

• pdf-lib

  1.17.1

  MIT

  Print-ready PDF files, built in the browser.

• lucide-react

  1.54.0

  ISC

  Small interface icons.

• @radix-ui/react-dialog

  1.2.0

  MIT

  The unlock window and the mobile menu.

• @radix-ui/react-accordion

  1.2.21

  MIT

  The question list.

• @radix-ui/react-label

  2.1.16

  MIT

  Form labels.

• @radix-ui/react-separator

  1.1.16

  MIT

  Dividers.

• @radix-ui/react-slot

  1.4.0

  MIT

  Buttons that can also be links.

• class-variance-authority

  0.7.1

  Apache-2.0

  Button styles.

• clsx

  2.1.1

  MIT

  Class names.

• tailwind-merge

  3.7.0

  MIT

  Class names.

• tailwindcss

  4.3.3

  MIT

  Build tool for the layout styles. It is not loaded as a separate script.

• typescript

  5.9.3

  Apache-2.0

  Build tool. It is not shipped to the browser.

• vitest

  3.2.7

  MIT

  Tests for time zones and sky positions. Not shipped to the browser.

• @tailwindcss/turbopack

  4.3.3

  MIT

  Build tool that turns the style sheet into CSS. Not shipped as a separate script.

• eslint

  9.39.5

  MIT

  Checks the source. Not shipped to the browser.

• eslint-config-next

  16.4.0

  MIT

  Lint rules for the framework. Not shipped to the browser.

• @types/node

  20.19.43

  MIT

  Type declarations for the build. Not shipped.

• @types/react

  19.3.0

  MIT

  Type declarations for React. Not shipped.

• @types/react-dom

  19.3.0

  MIT

  Type declarations for React DOM. Not shipped.

Our own work

• The poster drawings, including constellation lines, are our own. The lines follow traditional Western figures and were written for this project. They are not taken from another star-map program.
• The Milky Way on the darker designs is a soft band calculated from each star’s place in the sky and the standard north galactic pole. It is not a photograph and not a separate catalogue.
• The moon print is a disc drawn in the browser from the calculated phase. The dark patches are a simple pattern, not a photograph of the Moon.
• Paper grain, foil-gold rings, and watercolour washes are drawn in the browser for each poster. The framed pictures used in the shop images are drawn the same way. No stock photographs are used.
• Star coordinates stay in a separate file under the HYG licence. The rest of the site is our own work, all rights reserved.