What are the three types of dusk?

Could you please elaborate on the concept of "three types of dusk"? It's an intriguing phrase that seems to suggest a unique categorization within the context of dusk, a time of day when light fades and darkness begins to settle in. Are you referring to some sort of metaphorical or cultural interpretation of dusk, or is there a specific scientific or astronomical basis for this classification? I'm intrigued to learn more about how these three types of dusk might differ from each other and what sets them apart.