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.
Image copyright NASA Image caption Uranus is the only planet to rotate on its side Uranus is the third biggest planet in the solar system and the only planet that rotates on its side. Scientists think it may have been knocked over onto its side by another planet long ago. This means that some parts of Uranus can't be reached by the Sun for long periods of time. Some nights can last as long as 40 Earth years there! Uranus was the first planet to be discovered by a telescope by Sir William Hershel in 1781.