Rotation Movement Example

Rotation It is the action of rotating, turning, turning. It is called rotation to the movement that the earth makes on its own axis (called rotary axis) which is inclined 23 °, 27, it is an axis imaginary based on the ecliptic (which is the line through which the sun makes an apparent movement, seen from the land). The rotation It is one of the four movements that the earth makes, along with the movements of translation, nutation and precession.

This movement of rotation has a duration of twenty-three hours, fifty-six minutes, and four seconds, which is the time necessary for the earth to rotate around itself, a time which is called a sidereal day or day sidereal.

The rotation of the earth is made in a counterclockwise direction, (taking the pole star as a reference point)

The rotation of the earth is partially affected by the gravitational force of the moon its natural satellite, causing a slowdown which is visible only through several millennia due to the slowness in which said rotational slowdown of the planet.

According to studies, the earth varies a millionth of a second every day, but this slowdown would take a long time to be noticed, at the current rate that has been noticed in the slowdown of the rotation from the earth, it would take approximately 140 million years for the day to last twenty-five hours.

The rotation of the earth intervenes in the climate of the planet, because thanks to it it heats up relatively regularly (through intervals of light and shadow) the earth's surface, thereby affecting the geothermal state, contributing to the existence of life on earth, otherwise had rotation, or if it were slower, (let's say it took a week to turn) the part of the planet facing the sun would get too hot and the opposite side would freeze, preventing life.

The man since ancient times, noticing the constant repetition that occurred in the succession of day and night caused by the rotation of the earth, (approximately twenty-four hours), took the succession of days and nights caused by the rotational movement of the earth, as a measure of time, being the measure in which calendars are based to count time, adding the days together with the lunar phases or the apparent movement of the sun, thus forming the first calendars.