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Neptune

Neptune


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It is the eighth planet in our solar system, in order of distance from the Sun, but it is also the last of the giant planets.

Neptune has an equatorial diameter of 49,500 km, slightly lower than that of Uranus; It has a mass 17.2 times greater than that of the Earth and, consequently, a density of 1.7 (somewhat higher than that of water). It is located at an average distance of 4.5 billion km. of the Sun and employs one hundred and sixty-five years to complete a full circle around it.

The planet makes a complete turn around itself in 15.8 hours and its axis is irclined with respect to the vertical, in 28 degrees and 48 minutes.

In 1845, in effect, two astronomers, the English J. C. Adams and the French U. J. Leverrier, independently concluded that Uranus' orbit was altered by the presence of a Celestial body beyond its orbit. Leverrier requested an investigation in a specific sector of the sky from his colleagues at the Berlin Observatory and thus, on September 23, 1845, J. G. Galle was able to discover Neptune.


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