Day and night occur because of the rotation of a planet around its axis. The hemisphere of the planet that faces the sun at a particular moment experiences daylight, while the opposite side experiences darkness. The Earth rotates counterclockwise from west to east.Know More
Earth takes 23 hours and 56 minutes on average to make a complete rotation with respect to the sun, which adds up to a single day every four years. This is why leap years exist, so the lost day can be made up. Day and night have different lengths throughout the year, depending on the latitude of a particular location and what season it is. For example, summer in the Northern Hemisphere has longer days than nights. At the poles, the days and nights last for six months because they are always pointed either toward or away from the sun.
When a hemisphere of the planet is facing away from the sun, it does not receive sunlight, and night occurs because residual sunlight and heat from the previous period of daylight is being used up. When Earth rotates to bring that hemisphere back into the path of the sun's rays, sunlight once again heats and lights that hemisphere.Learn more in Planets
Venus has the longest day of any major planet in the solar system, taking 243 days to complete a full rotation along its axis. Due to its slow rotation, Venus has a day that is longer than its year.Full Answer >
The Sun appears to move across the sky during the day due to the rotation of Earth along its axis. Because Earth rotates from east to west, the Sun first appears on the eastern horizon and then moves westward across the sky until it falls below the western horizon.Full Answer >
Seasons occur on Earth because the planet is tilted on its axis at just over 23 degrees. Both the Southern Hemisphere and the Northern Hemisphere are tilted closer to the sun as the planet completes a full orbit.Full Answer >
A day on Saturn is 10.7 Earth hours long, which is the amount of time it takes for the planet to make a complete rotation on it axis. Saturn makes a full orbit around the sun in a period of time equal to 29 Earth years. Saturn is about 886 million miles from the sun and is the sixth furthest planet in the solar system.Full Answer >