PENNSYLVANIA, USA — It is the first day of Astronomical Fall or the Autumnal Equinox.

It is the moment the sun aligns with Earth's equator. Equinox, by definition, means equal night, but we don't technically have exactly 12 hours of daylight and 12 hours of darkness on the day of the equinox.

Sunrise on Monday morning in Scranton was at 6:50 a.m., and the sun will set this evening at 6:59 p.m., so that is 12 hours, 8 minutes, and 49 seconds of daylight today, to be exact.

This is for a few reasons. The Earth's atmosphere refracts, or bends, light. Therefore, we can see light even when the sun is just below the horizon, when the sun is both rising and setting.

And because we define sunrise and sunset as the exact moment the upper edge of the Sun's disk touches the eastern and western ho

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