Star Almanack browser ephemeris

Calculations: the site's Python engine using Skyfield 1.55 (MIT),
jplephem 2.24 (MIT), sgp4 2.27 (MIT), NumPy 2.0.2 (BSD-3-Clause),
Pyodide 0.27.7 (MPL-2.0) and Python 3.12 (PSF license).
certifi 2026.2.25: MPL-2.0. tzdata 2025.2: Apache-2.0; IANA data
is public domain. Package distributions include their license files.
Pyodide source and license: https://github.com/pyodide/pyodide/tree/0.27.7
NumPy source and license: https://github.com/numpy/numpy/tree/v2.0.2
Python license: https://docs.python.org/3.12/license.html

Source coefficients: JPL DE440s and NAIF-distributed Ceres 1900-2100
SPK. These files are reused locally, without a remote ephemeris API.
NAIF rules: https://naif.jpl.nasa.gov/naif/rules.html
See the repository's EPHEMERIS-PROVENANCE.md for calculation provenance.

City locations: adapted from GeoNames cities15000, CC BY 4.0.
https://www.geonames.org/ ; https://creativecommons.org/licenses/by/4.0/
Columns are selected, elevation is clamped to the supported input range,
and records are sorted. GeoNames does not endorse this application.