Terra

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Why do we need scientific names for things? Usually, one of two reasons. Either, for an international standard across languages, such as with many chemicals, or otherwise to be as precise as possible.  So, why would the Earth need a scientific name? If you say “The Earth”, it’s perfectly clear what you mean. Now, there might be some confusion with other languages, if I say “Erde” and a French person says “La terre”, but we can usually communicate. I assume the scientific community just uses English for the most part in astronomy too.

Earth is the third planet from the Sun and the only astronomical object known to harbor life. According to radiometric dating and other evidence, Earth formed over 4.5 billion years ago. Earth’s gravity interacts with other objects in space, especially the Sun and the Moon, which is Earth’s only natural satellite. Earth orbits around the Sun in 365.256 solar days, a period known as an Earth sidereal year. During this time, Earth rotates about its axis 366.256 times, that is, a sidereal year has 366.256 sidereal days

Our planet is the only one in the solar system and can be in the Universe to house complex life forms, especially human beings. As such, it is wise and prudent not only to protect ourselves against any risk of extinction (for example following a global war or a fatal virus) but also to protect the only planet on which we can live in the open air and as its environment, including all the species around us, both animal and plant living on land, in the air or in the water and that allow us to live.

The Earth is also a unique planet in the solar system and perhaps in the Universe because it has at the same time an ocean of liquid water, ocean in which appeared the first forms of life there are more than 3.9 billions of years, an atmosphere that protects us from the harmful rays of the Sun and high energy emissions from other celestial bodies (eg supernovae) and continents where life has been able to develop and humanity to settle and build cities at the height of its power and technology.

In summary, the Earth is about 149.6 million km from the center of the Sun, which also defines 1 Astronomical Unit or U.A. In fact, like all stars, the Earth moves in an elliptical orbit that varies between 147 million and 152 million km from the Sun.

Our planet is characterized by its 4 seasons (or 2 in the tropics), weather phenomenon induced by the inclination of the axis of rotation, inclined 23° 27 ‘compared to the vertical. The Earth also turns on itself, performing a full rotation in 23h59m4s that defines the length of the day.

Finally, since the dawn of time the Earth is escorted by the Moon which measures 3476 km in diameter. It was probably born from the impact of an asteroid that expelled a large amount of lava-like material into the space that finally condensed and formed the Moon.

It is difficult to summarize everything the Earth represents in a few lines so the subject is vast and exciting. So I suggest you consult the more detailed articles devoted to the Earth, its atmosphere (weather), water, ecology (protection of the environment) and of course to the evolution of life. origin and future of man.

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