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Cosmic Discovery Hub

Sources & Methodology

Last updated: 2026-10-09. This document is a plain-language starting point and should be reviewed by a qualified legal professional before commercial launch.

Primary sources: NASA Planetary Fact Sheets, NASA Open APIs (APOD, NeoWs, Mars Photos, DONKI), the Where-the-ISS-at service, ESA/Gaia parallax data, and CODATA constants. Calculator references are listed on each calculator page.

Live data is fetched server-side, cached (APOD 6h, NEO 1h, ISS ~10s), and displayed with its fetch timestamp. Planet-to-planet distances shown in tools are averages unless a live ephemeris is explicitly stated.