What is "moonsets"

Usage examples of "moonsets".

The city streets, sunrises and moonsets, the sound of honking horns, wind in the trees of the Park, all of it was being slowly dissolved in still black air, humming sometimes loudly, sometimes softly, with the buzz and hiss of saurian voices in their hundreds of thousands.

If the enemy remade Coruscant, as they'd done to Belkadan, what color would these moonsets turn?