equinox

On September 21st, 2013 Earth’s northern hemisphere officially observed the autumnal equinox. This is the day where the day is equally as long as the night. On the next day, September 22nd, 2013, night was longer than day bringing us that much closer to our beloved northern winter and ski season. Why does Earth have seasons? We’ll NASA answer that one for us: One of the most frequently misunderstood concepts in science is the reason for Earth’s seasons. As we experience the September equinox today […]