Because at night the part of the world where we live has turned away from the sun.Although we cannot feel it ,our planet is spinning in space .it takes a day and a night to turn full circle.
so the side of the earth that is facing the sun is having daylight, and on the other side it's-goodnight
NIGHT AND FACTS
- On June 21, the northern half of the earth has its longest day and its shortest night.
- The shortest day and the longest night is on December 21
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