The period of revolution of the Earth around its axis is equal to?

The period of revolution of the Earth around its axis is constant. Astronomically, it is 23 hours 56 minutes and 4 seconds. However, the scientists did not take into account the insignificant error, rounding up these figures to 24 hours, or some earthly days. One such revolution is called the daily rotation and occurs from west to east. For a person from the Earth it looks like morning, afternoon and evening, succeeding each other. In other words, the sunrise, noon and sunset completely coincide with the daily rotation of the planet.

What is the Earth's axis?

The Earth's axis can be thought of in the form of an imaginary line around which the third planet from the Sun rotates. This axis crosses the Earth's surface at two constant points - in the North and South geographical poles. If, for example, mentally continue the direction of the earth's axis up, it will pass next to the North Star. By the way, this explains the immobility of the Polar Star. An effect is created that the celestial sphere moves around the axis, and hence around this star.

It seems to the person from the Earth that the starry sky rotates in the direction from east to west. But this is not so. The apparent movement is only a reflection of the true daily rotation. It is important to know that our planet simultaneously participates not in one, but at least in two processes. It revolves around the earth's axis and makes an orbital motion around the heavenly body.

The apparent movement of the Sun is the same reflection of the true motion of our planet in its orbit around it. As a result, first comes the day, and then - the night. Let us note that one movement is inconceivable without the other! These are the laws of the universe. In this case, if the period of revolution of the Earth around its axis is equal to one earth day, the time of its movement around the heavenly body is variable. We learn what affects these indicators.

What affects the speed of the Earth's orbital rotation?

The period of revolution of the Earth around its axis is a constant value, which can not be said about the speed with which the blue planet orbits around the luminary. For a long time, astronomers thought that this speed is constant. It turned out that no! At present, thanks to the most accurate measuring devices, scientists have found a slight deviation in previously obtained figures.

The reason for this variability is the friction that occurs during the sea tides. It directly affects the decrease in the orbital velocity of the third planet from the Sun. In turn, the ebb and flow are the result of the action of the Earth on its permanent moon, the moon. Such a revolution of the planet around the heavenly body does not notice a person, as well as the period of revolution of the Earth around the axis. But we can not but pay attention to the seasons: spring is replaced in summer, summer is in autumn, and autumn is in winter. And it happens all the time. This is the result of the orbital motion of the planet, lasting 365.25 days, or one earthly year.

It is worth noting that the Earth moves unevenly relative to the Sun. For example, at some points it is the closest to the heavenly body, while in others it is most distant from it. And again: the orbit around the Earth is not a circle, but an oval, or an ellipse.

Why does not a person notice the diurnal rotation?

Man will never be able to notice the rotation of the planet, being on its surface. This is due to the difference in the size of our and the globe - it is too huge for us! Period of revolution of the Earth around its axis can not be noticed, but it will be possible to feel: the day will change at night and vice versa. This has already been discussed above. But what if the blue planet could not rotate around the axis? And here's what: on one side of the Earth would be an eternal day, and on the other - an eternal night! Awful, is not it?

It is important to know!

So, the period of revolution of the Earth around its axis is almost 24 hours, and the time of its "journey" around the Sun is about 365.25 days (one earth year), since this quantity is unstable. Let's pay your attention to the fact that, in addition to the two movements considered, the Earth participates in others. For example, it, along with the rest of the planets, is moving relative to the Milky Way - our native Galaxy. In turn, the Milky Way makes some movement with respect to other neighboring galaxies. And everything happens because in the universe there was and never will be anything immutable and immovable! This must be remembered for life.