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 about Planets
The planet of Mercury is extremely hot during the day and becomes terribly cold at night. The temperature during the day on Mercury can reach as high as 800 degrees Fahrenheit, while the night temperatures can plunge to almost 300 degrees below zero.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 >
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 >
Venus differs from the other planets of the solar system in that it rotates in the opposite direction of other planets, and it takes a total of 243 Earth days to complete a rotation. One Venusian year is shorter than one Venusian day, lasting only 225 Earth days.Full Answer >