Drop an asteroid and see what it does: set what it's made of, how wide and how fast, then click anywhere on the map for the crater, the fireball, the rings where things burn and shatter, and the number that actually matters — how many people are standing inside them. Put it in the ocean instead and you get the wave. Three ways in: Simple sizes a rock and drops it where you click; Orbital takes real NASA/JPL orbital elements and propagates the encounter against Earth's; What If takes a real near-Earth asteroid like Apophis and shows what its impact would look like. That last one is pure what-if — built for curiosity, not prediction. None of these asteroids is on course to hit Earth; the tool deliberately forces a strike so you can see the consequences. Estimates, not forecasts — read the notes with each result.
Impacts are the one natural disaster we could see coming years out — and the one no bunker survives at the top end.
Drop a rock on the map — or check a real one's close approach.
Two ways in. Simple puts an impact wherever you click and tells you what it does. Orbital takes a real asteroid’s orbit, propagates it around the Sun, and checks the close approach against NASA’s published numbers.
Impact scaling is Collins-Melosh-Marcus; the orbit propagation is a clean two-body model that matches NASA to first order but is not a JPL-grade solution. The tsunami estimate is first-order scaling (Ward & Asphaug; Collins et al.) — real run-up depends on bathymetry and coastline shape and varies by an order of magnitude, and impact tsunami is genuinely argued over in the literature. Built for understanding scale and “what if,” not for asserting any real object will hit.
