金環食2012
Simulation and countdown for annular solar eclipse at May 20, 2012 (May 21/JST).
With iPhone 4 or 4S, AR(augmented reality) is available and useful to determine observation location.
Simulation and countdown for annular solar eclipse at May 20, 2012 (May 21/JST).
With iPhone 4 or 4S, AR(augmented reality) is available and useful to determine observation location.