Influence On The Earth
Because of the axial tilt of the Earth (often known as the obliquity of the ecliptic), the inclination of the Sun's trajectory in the sky (as seen by an observer on Earth's surface) varies over the course of the year. For an observer at a northern latitude, when the northern pole is tilted toward the Sun the day lasts longer and the Sun climbs higher in the sky. This results in warmer average temperatures from the increase in solar radiation reaching the surface. When the northern pole is tilted away from the Sun, the reverse is true and the climate is generally cooler. Above the arctic circle, an extreme case is reached where there is no daylight at all for part of the year. (This is called a polar night.) This variation in the climate (because of the direction of the Earth's axial tilt) results in the seasons.
Read more about this topic: Earth's Orbit
Famous quotes containing the words influence and/or earth:
“They tell us that women can bring better things to pass by indirect influence. Try to persuade any man that he will have more weight, more influence, if he gives up his vote, allies himself with no party and relies on influence to achieve his ends! By all means let us use to the utmost whatever influence we have, but in all justice do not ask us to be content with this.”
—Mrs. William C. Gannett, U.S. suffragist. As quoted in History of Woman Suffrage, vol. 5, ch. 8, by Ida Husted Harper (1922)
“An underground grower, blind and a common brown;
Got a misshapen look, it’s nudged where it could;
Simple as soil yet crowded as earth with all.”
—Richard Wilbur (b. 1921)