The number of victims depends on which definition of the Holocaust is used. Donald Niewyk and Francis Nicosia write in The Columbia Guide to the Holocaust that the term is commonly defined as the mass murder of more than five million European Jews.
A colour photograph of Uranus, taken by Voyager 2 in 1986 as it headed towards the planet Neptune. The exploration of Uranus has, to date, been solely through telescopes and NASA 's Voyager 2 spacecraft, which made its closest approach to Uranus on January 24, 1986.Voyager 2 discovered 10 moons, studied the planet's cold atmosphere, and examined its ring system, discovering two new rings.he Uranian moon Miranda, imaged by Voyager 2. Uranus is the third-largest planet in the Solar System. It orbits the Sun at a distance of about 2.8 billion kilometers (1.7 billion miles) and completes one orbit every 84 years. The length of a day on Uranus as measured by Voyager 2 is 17 hours and 14 minutes.
Though Uranus is visible to the naked eye like the five classical planets, it was never recognized as a planet by ancient observers because of its dimness and slow orbit. Sir William Herschel announced its discovery on March 13, 1781, expanding the known boundaries of the Solar System for the first time in history.hough Uranus is visible to the naked eye like the five classical planets, it was never recognized as a planet by ancient observers because of its dimness and slow orbit. Sir William Herschel announced its discovery on March 13, 1781, expanding the known boundaries of the Solar System for the first time in history.