Gemma 4 Challenge: Build With Gemma 4 Submission

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 capability:

🌌 Tonight's Sky — Real-time sky map with Gemma narration. Tap any object and ask "Why is it there?" — Gemma explains the orbital mechanics.

💬 Sky Chat — Multi-turn conversation with the full sky state injected as context.…