Building a Real-Time Artemis II Orbital Tracker with NASA's JPL Horizons API

NASA's Artemis II launched in April 2026, and I wanted to track it in real time — not from a news feed, but by querying the actual spacecraft ephemeris data from JPL Horizons and rendering it on a 2D orbital map with the Moon. The result: a bilingual dashboard at artemis.firstcommit.io where you can scrub through the entire mission timeline.