Ephemeris¶

The Ephemeris box is used to calculate the significant events visible from your location. Please note that all displayed times are indicated in Universal Time (UT).

Note

Universal Time (UT) is a time scale based on the rotation of the Earth. It is the modern extension of the Greenwich Mean Time (GMT), which is the average solar time at the Greenwich meridian. GMT was replaced by UT in 1972.

By clicking on a line, you can view the corresponding event on the map. For example, if you click on the line 07:36 First Quarter, the program is set to December 4, 2019 at 7:36 UT and points to the Moon.