I love sunsets. They are so beautiful and seem to never be the same which keeps them intriguing.
They may look different because they set in a different place every day and will set on due west on the spring and fall equinoxes. 
That would make sense. My favorite are sunsets at the beach. Nothing better than that.
Yeah a sunset doesn't technically happen until the trailing edge of the sun disappears 
I always assumed once the colors started changing that was technically the sunset. What else do you know about them?
astronomical" twilight, which is the period when the Sun is between 12 and 18 degrees below the horizon. "Dusk" is at the very end of astronomical twilight, and is the darkest moment of twilight just before night. Night occurs when the Sun reaches 18 degrees below the horizon and no longer illuminates the sky.
Locations further north than the Arctic Circle and further south than the Antarctic Circle experience no full sunset or sunrise on at least one day of the year, when the polar day or the polar night
September equinox to the March equinox. Sunsets occur almost exactly due west on the equinoxes for all viewers on Earth. Exact calculations of the azimuths of sunset on other dates are complex, but they can be estimated with reasonable accuracy by using the analemma.
As sunrise and sunset are calculated from the leading and trailing edges of the Sun, respectively, and not the center, the duration of a daytime is slightly longer than nighttime (by about 10 minutes, as seen from temperate latitudes). Further, because the light