Another customer asked if this could be used as a pool timer, and you said no, it's meant to be used as astrological timer. What does that mean?

The astro feature means it knows what time the sunsets in you location (with monor programing) and adjust the turn on time.

Oops, I meant astronomical. How dies this timer pertain to astronomical uses. That pertains to the sky, the description says a lighting timer, I assume that means like landscape lighting.