Look up. Then look down at this page. Each instrument here is a small live model of something happening above you right now — the day-night terminator sliding around the planet, eight thousand satellites in their real orbits, the magnetosphere flexing in response to today's solar wind. The sky as a working diagram.
A live Earth lit by the actual sun. The day-night terminator tracks real UTC; city lights glow on the night side; clouds scroll above the surface; the atmosphere's blue halo wraps the limb.
8 000+ active satellites in real-time TLE-propagated orbits around a 3D Earth; click any dot for name, NORAD ID, altitude, and period; filter by constellation.
Earth's dipole field lines and magnetopause shaped live by NOAA SWPC solar-wind data; southward Bz triggers a suggestive reconnection animation. Dipole approximation, Shue 1997 model.
Every airborne aircraft from OpenSky as instanced dots over a 3D globe, each trailing ~3 minutes of fading contrail history dead-reckoned between live fixes.
All eight planets orbiting the Sun with Keplerian elements, toggle between "pretty" exaggerated scale and true-to-scale mode to feel how empty space actually is.