Meaning of movement of rotation and translation

What is Rotational and Translational Motion:

The planet Earth is in constant motion, it rotates on itself causing day and night and, it moves around the Sun generating the seasons of the year.

Rotatory motion

Rotation is the continuous movement of the Earth on an imaginary axis called the Earth's axis or the polar axis, which is an imaginary line that goes from the North Pole to the South Pole.

The rotation movement lasts 24 hours, that is, a day or solar day if the Sun is taken as a reference, or if the stars are taken as a reference, then a day lasts 23 hours and 56 seconds and is called a sidereal day.

As the Earth is spherical in shape, during the rotational movement the rays of the Sun can only illuminate one part of the Earth while another remains dark, therefore, when the sun's rays fall in one area it is daytime, but in another it is night, and so on throughout the movement.

Through the Foucault pendulum, it is possible to demonstrate what the Earth's rotation is like and the latitude of a place can be determined without having to resort to astronomical observations.

What causes the rotational movement

The rotational movement generates different effects on the Earth and on living beings, which largely determine our daily routines and modes of human development.

Day and night: during the rotational movement, half of the Earth receives the sun's rays, so it is daytime in certain countries. However, the other half is dark and it is night, and so on until the Earth has completely rotated.

Time difference: the rotational movement determines the time zones between countries, as only part of the Earth receives sunlight as it rotates and then night falls. For this reason, it dawns first in the eastern countries and then in the western ones.

Flattening of the poles: The centrifugal force generated by the rotational motion causes the poles to flatten and the equator to widen.

See also the meaning of Rotational movement.

Translation movement

Translation is the elliptical movement that the Earth makes around the Sun, in a west-east direction, counterclockwise, so it gives the impression that the sky is moving.

It takes the Earth 365 days, 5 hours, 57 minutes and 45 seconds to make a turn, which is equivalent to the beginning of each year a little earlier, but then compensated, since every four years a day is added to it to the month of February, on the 29th, and is called a leap year and has 366 days.

Now, the Earth's orbit is elliptical and as the Earth's axis is inclined 23.5 ° on it, this causes the solar rays to arrive with a different inclination to each hemisphere of the Earth, which is why the seasons of the year and that the poles have long periods of darkness and light.

What causes the translational movement

The movement of translation also affects and determines the way of life of living beings, since it even defines when certain activities can be carried out and in what way according to the season of the year, for example.

Seasons of the year: by means of the translational movement the Earth adopts four positions that determine the seasons of the year: summer, autumn, winter and spring.

See also the meaning of Earth.

Areas of the Earth: due to the translational movement and the inclination of the Earth's axis, solar radiation varies in certain areas of the Earth, consequently there are two polar zones, two temperate zones and a warm zone.

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