Group R Day And Night
The Earth takes 24 hours to make one complete turn. This means that as the day goes on, the sun will appear to move position because as we spin we are turning away from the sun. this also means that when it is the middle of the night in the UK, its midday on the opposite side of earth. The earth rotates on a central axis. however, studies have shown that the earth is slowing down, but its certain it will stay spinning for centuries longer.At the equator, the Earth is rotating at a speed of about about 2200 kilometers per hour. Good thing we human beings can't feel this motion!It takes the Earth 24 hours to make one complete turn on its axis, so an Earth day is 24 hours long.Different planets take different amounts of time to make one complete turn, so they have different lengths of day. This process can also be known as the diurnal cycle. You cant feel the earths rotation because it is spinning at a constant speed. imagine being in a car, travelling at a constant speed, and you will realize that when your travelling at a constant speed you don't realize! As the Earth turns, the stars come back to the same place in the night sky every 23 hours, 56 minutes and 4.09 seconds. This is called a sidereal day (star day). A day on Mars is 24.6 hours — much the same as ours, and a day on the Moon lasts one Earth month.
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