StarLens: Gemma 4 as Your Personal Planetarium Guide

This is a submission for the Gemma 4 Challenge: Build with Gemma 4 What I Built StarLens — an AI-powered night sky companion where Gemma 4 is the protagonist, not a bolt-on. StarLens computes the real-time positions of 118,000 stars, 8 planets, the Sun, and Moon using NASA/JPL ephemeris data (Skyfield + Hipparcos catalog), then feeds that data into Gemma 4 so every answer is grounded in actual science — not hallucination. It features 7 interactive tabs , each showcasing a different Gemma 4 capab