Night shadow

Black shadow on the nighttside of the Earth. The shadow is drawn in every 30 minutes.
White area is the approximate region where the solar zenith angle is between 80 and 90 degrees.

Precise times of the sunrise and sunset are provided by some Web pages, such as U.S. Naval Observatory, and National Astronomical Observatory of Japan.


Plotted by Dagik team of Kyoto University/SPEL.