Change your viewpoint of the Moon, read a moving seafloor, follow water, and find the displacement that holds a boat up.
Interactive explorationInspect the real EHT observation, then choose a direction in a calculated light map. Follow its exterior path, find its source and reveal two images of one tiny patch.
Interactive explorationOpen a generic engine, follow what it carries and keep every bit of expelled mass in the story. Change who measures the motion, balance the thrust terms and discover what staging actually changes.
Interactive explorationDraw a velocity arrow, predict a path and compare two spacecraft on one clock. Follow a real NASA Earth map, inspect the next moment of free fall and discover why speed alone cannot make a circle.
Interactive explorationWatch waves emerge from a buried source, pick synthetic arrivals and reveal the location one clue at a time. Test the clocks, depth and velocity assumptions—and compare the model with real recorded evidence.
Interactive explorationFreeze two model temperatures, change infrared transfer and release time. Follow every energy route, move the accounting boundary and compare the model with real atmospheric evidence.
Interactive explorationMove the Moon around Earth and compare two viewpoints at once. Make a crescent, then tilt the orbit to discover why an eclipse is a special alignment.
Interactive explorationPull a ridge apart over millions of years. Read the age and magnetic pattern left behind, then compare spreading, sliding and subduction.
Interactive explorationFollow water above and below the surface. Pave part of the land, change evaporation, and watch the water budget rearrange.
Interactive explorationLoad a tiny barge and watch its waterline rise along the hull. Then lower a block through a tank to connect water pressure with buoyancy.
Take these steps at your own pace. Your place is not saved as account progress or scored.