Our solar sistem
This deceleration is happening almost imperceptibly, at approximately 17 milliseconds per hundred years, although the rate at which it occurs is not perfectly uniform. This has the effect of lengthening our days, but it happens so slowly that it could be as much as 140 million years before the length of a day will have increased to 25 hours.
Uranus is the seventh planet of the solar system in order of distance from the Sun, its name comes from the greek god of the sky: Uranus.
Although it is visible to the naked eye, as the other five planets known since ancient times, it was never recognized because of its low light and its orbit particularly slow; it was discovered only 13 March 1781 by William Herschel, making it the first planet to be discovered through a telescope.
Neptune is the eighth and farthest planet in the Solar System, starting from the sun. The planet's name is dedicated to the Roman god of the sea
Discovered September 23, 1846 by Johann Gottfried Galle with the telescope of the Astronomical Observatory of Berlin. Neptune was the first planet to be found by mathematical calculations. The planet was discovered by just one degree from the expected point.
Pluto is a dwarf planet orbiting in the outlying regions of the solar system, was discovered in 1930 by Clyde Tombaugh and initially ranked as the ninth planet. Reclassified as a dwarf planet August 24, 2006.
After its discovery, the new celestial body was christened in honor of Pluto, the Roman god of the underworld.