Editing Terminator (solar) (section)

{{Short description|Line dividing day and night on a celestial body}}
{{For|other meanings|Terminator (disambiguation){{!}}Terminator}}
[[File:Apollo 11 Mission Image - View of Earth terminator (5052744816).jpg|upright=1.35|thumb|Earth's terminator as seen from space]]
A '''terminator''' or '''twilight zone''' is a moving line that divides the [[daylight|daylit]] side and the dark [[night]] side of a [[astronomical object|planetary body]]. The terminator is defined as the [[locus (mathematics)|locus]] of points on a [[planet]] or [[natural satellite|moon]] where the line through the center of its parent [[star]] is [[tangent]]. An observer on the terminator of such an orbiting body with an [[atmosphere]] would experience [[twilight]] due to [[light scattering by particles]] in the gaseous layer.