In the cover, you can see an image of Earth revolution Credit: web “exampariksha.com”
The movement it describes is an elliptical trajectory of 930 million kilometers in length, which travels at an average speed of 106,000 km / hour (29.5 km / second), staying at an average distance from the Sun of 150 million kilometers.
In one day, all the inhabitants of the Earth have traveled 2,544,000 km in orbit around the Sun.
It is the same as saying that, after 24 hours, we are more than 2 million kilometers from where we were previously! !
At the equinoxes, the Earth’s axis of rotation is perpendicular to the Sun’s rays, which fall vertically on the equator.
At the solstices, the axis is inclined 23.5º, so the solar rays fall vertically on the tropic of Cancer (summer in the northern hemisphere) or Capricorn (summer in the southern hemisphere).
The Sun occupies one of the foci of the ellipse.
Due to the eccentricity of the Earth’s orbit, the distance between the Sun and the Earth varies throughout the year and the Earth travels its path with variable speed.
It goes faster in early January, when it is closest to the Sun (at perihelion, at 147.5 million km); and more slowly, at the beginning of July, when it is further away (at the aphelion, at 152.6 million km).
This also means that the Earth receives 7% more heat in the month of January (closer to the sun), than in the month of July.
For this reason, in addition to other factors, the boreal winter is less cold than the southern one, and the southern summer is hotter than the boreal one.
The Earth in its trip around the Sun takes a complete revolution 365 days and 6 hours, approximately.
More exactly, 365 days, 5 hours and 57 minutes 365.2422 days This is the so-called translational movement, which corresponds to the solar year.