Saturn

• Day


  The period of one complete rotation of the Earth, which takes 23 hours, 56 minutes, and 4.2 seconds
• The Earth turns from west to east direction in a counterclockwise motion
• Earth's rotation


  • Earth is tilted at an angle of 23.5 degrees on its axis
  • The axis is not perpendicular to the plane of its orbit
  • The North and South Poles are the two opposite ends of the axis
  • The tilt of Earth's axis makes day and night unequal in length
• Rotation


  The spinning or movement of the Earth on its axis from west to east, completed in 24 hours or 1 day
• Earth spins or rotates at a speed of 1674.4 kilometers per hour (km/h) on its axis
• Earth rotates once in about 24 hours with respect to the sun, but once every 23 hours, 56 minutes, and 4 seconds with respect to other distant stars
• Earth's rotation is slowing slightly with time, so the day has been shorter in the past due to the tidal effects of the Moon
• Earth's rotation


  Causes the daily rise and fall of sea level known as tides
• Earth's rotation


  Causes the Coriolis Effect - the deflection of the atmosphere toward the right in the Northern Hemisphere and toward the left in the Southern Hemisphere, resulting in curved paths
• Earth's rotation


  Causes the occurrence of daytime and nighttime
• The part of the Earth that is reached by the sun's rays experiences daytime, while the rest experiences nighttime
• After 24 hours, a location on the Earth will be back at the same point where it started
• Revolution


  The movement of an object around a bigger object
• Orbit


  The slightly flattened circle around the sun that the Earth travels in
• The sun is not at the center of the Earth's orbit, but is slightly off to one side
• Perihelion


  The point in the orbit of Earth at which it is closest to the sun
• Aphelion


  The point in the orbit of Earth where it is farthest from the sun
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• Earth's Period of Revolution


  The movement of an object around the bigger object is called revolution. Earth revolves around the sun. The slightly flattened circle around the sun is called an ellipse and it is the Earth's orbit. The sun is not at the center of the orbit, but it is lightly off to one side. This explains why Earth's distance from the sun varies. It is closest to the sun at 147 million kilometers when it is in its orbit's perihelion. It Is farthest from the sun at 152 million kilometers when it is in its orbit's aphelion. Perihelion is the point in the orbit of Earth at which it is closest to the sun. The aphelion is the point in the orbit of Earth where it is farthest from the sun.
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• Figure 1: Earth's Revolution


  Earth revolves around the sun as shown in figure 1 or spins on its axis. One complete revolution is equal to one year and it is 365.24 solar days or 365 days, 5 hours, 48 minutes and 46 seconds. Earth's axis is tilted. As it orbits the sun. Earth's axis remains fixed in space so that at one point, the northern hemisphere of Earth is tilted.
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