Alexander (Sasha) Plavin interactive demos Interactive Astronomy Demos Standalone visualizations – mostly blackhole-themed – that I wrote for teaching. Poke at them! You Can See This Yourself No black holes required 🌍 The Sun over Earth Understand how Sun moves and can be used for navigation. 🌊 Tides Moon or Sun — which one wins? Then try a black hole. 🌘 Eclipse: Stars Shift Light bends around our Sun – not just black holes. Eddington, 1919. Now Change One Thing Turn the knob, see what breaks 💥 Newton's Cannon Launching to space from Earth and from a black hole. 🌐 Squeeze the Earth Keep the mass, shrink the radius: 6371 km → small marble. 🕳️ Turn the Sun into a Black Hole Same mass, tiny radius. Will the planets notice? All the Way In What gravity does up close ✨ Light Around a Black Hole Even light rays move peculiarly! 💫 Accretion Disk A flat ring — but gravity lets us see its far side up. ⏳ Falling into a Black Hole What they feel vs. what you see.
