Interactive dashboard for the April 2026 Lyrid meteor shower, tuned for Boise. Live countdown, activity curves by date and by hour of the peak night, Boise-specific sun/twilight times, a 3D heliocentric visualization of Earth crossing Comet Thatcher's debris stream, and a viewing playbook (Bogus Basin, Owyhee, Hwy 21). Apr 17, 2026 html