Uranus was discovered in 1781 by Sir William Herschel. He used a telescope having a diameter of 17.8 cm. Uranus has 5 sub-planets.
Uranus completes one revolution around the Sun in 84 years, but it makes one rotation about the axis in 10 hours and 48 minutes. Its diameter is 51,600 km and density is 1.36. It is 15 times heavier than the Earth.
The greenish color of Uranus' atmosphere comes from methane and high-altitude photochemical smog. Many broad lanes of dust surround the 9 main rings of Uranus. The discovery of two shepherd satellites has advanced our understanding of the structure of the Uranian rings. The moons, baptized 1986U7 (Cordelia) and 1986U8 (Ophelia), are believed to confine other rings by their gravitational effects.
Miranda is the inner-most of the large satellites of Uranus. Its surface is made mainly of rolling plains with craters, that probably date back to the early days of the solar system, when impact occurrences were extremely high. Half of Miranda's surface is younger based on the fewer number of craters; it consists of complex sets of parallel and intersecting scarps and ridges.
Locals hypothesize that the legacy of Italian blood and culture in Cologne, colonized by the Romans more than 1500 years ago, makes the people more jovial and lighthearted. Cologne is the largest city on the Rhine.
Kolsch is not only the dialect spoken here but, also the name of their own top-fermented beer. There are more than 4,000 pubs, restaurant's and brewery taverns in Cologne.
Unlike many of the world's large cities, Cologne, with a population of over a million, gets better every day, there are more things to do and see, more new and innovative buildings... more
Travel is an opportunity to learn, whether geography, languages, history or other subjects.
Cologne is situated on the beautiful Rhine River.