SPARK Winter 2016-2017 | Page 18

THE LONGEST NIGHT Also known as the winter solstice, the longest night of the year usually happens on the 21st or 22nd December in our northern hemisphere. You’ll notice that the sun is low in the sky, the opposite to a high sun in summer. Centuries ago people used to be afraid that the disappearing light would never return unless they had a celebration. In countries such as Norway and Denmark, people burned logs believing that they could make the sun brighter. Why do we have a long night? It’s all to do with our side of the Earth leaning away from the sun in what is called a tilt, so it doesn’t receive as much light. It’s the opposite on the other side of the world where the day length with sunshine is more than 12 hours. When the Earth moves around the sun, it tilts at an angle. The top part of the Earth stays in the same position so as our planet spins around, sometimes it tilts towards the sun. In December the north, where we are, is tilted far away from the sun, resulting in colder temperatures. WANT TO KNOW MORE? WATCH THIS: https://youtu . be/l64YwNl1 wr0 18 SPARK