Why Day and Night Are the Same Length Today

Today marks the September equinox, when the sun sets exactly between due east and due, and autumn officially begins.

Science Why Day and Night Are the Same Length Today Between the summer and winter solstices, the sunrise and sunset slide slowly to the north, before returning to the south each year. Today marks the September equinox, when the sun sets exactly between due east and due west, day and night are the same length, and autumn officially begins. READ NOW Advertisement READ THESE What Causes the Seasons? 12 Plants That Eat Animals Antarctica: What's Beneath the Ice? You are receiving this newsletter because you subscribed to the Today I Learned newsletter. If you wish to unsubscribe, please click here A Dotdash Brand 1500 Broadway, 6th Floor, New York, NY, 10036 © 2017 Dotdash - All rights reserved. Privacy Policy.