The discovery of the planet Neptune is considered an asset of astronomy. This was and until today is an area that arouses the interest of many scientists. By the 17th century, astronomers were only aware of six planets, they were: Mercury, Venus, Earth, Mars, Jupiter and Saturn. From their existence, other planets were discovered and, in this way, the solar system was expanding. A few years after the death of the creator of the law of Universal Gravitation, Sir Isaac Newton, scientists accidentally discovered the existence of the planet Uranus and using the law that speaks of the attraction of bodies they managed to calculate the orbit that this planet should describe. However, after observations on the movements outlined by Uranus,
Aware of these conclusions and believing that Newton’s theory was not wrong, scientists Adams and Leverrier had the suspicion that the errors in the calculations were caused by the influence of another planet, until then unknown. Based on the law of Universal Gravitation, these two scientists performed new calculations in an attempt to discover the location of the supposed planet. Knowing the position, they pointed the telescopes and to their surprise there was the planet Neptune. In 1846, the newest planet in the solar system was discovered. Years later and similarly, the planet that appears to be the last planet in the solar system was discovered: Pluto, which today, as we know, is no longer considered a planet.