Transit of Mercury

This animation shows the Sun in UV at 1600 Angstroms over a several minute period on November 15, 1999. It also shows a transit of the planet Mercury, which appears as a dark disk against the Sun because it emits little UV radiation. Usage: Click "Play" to begin and "Stop" to pause. "Step" moves forward one step and "Back" moves backwards one step. "Home" returns to the beginning from any point.