Il papa' spiega la durata del giorno e della notte durante estate e inverno utilizzando una piccola luce e misurando la durata della luce sul mappamondo d'estate rispetto all'inverno.
Here I am using a red laser pointer to demonstrate the difference in daylight hours during the northern hemisphere summer, when we're tilted towards the sun, and winter when we're tilted away from the sun. As the laser pointer is so precise, you can catch where the exact moment of sunrise and sunset would be, and the difference in the length of the day, and the opposite seasons between northern and southern hemisphere, are understood easily. |
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