Ask Mr Brain...all will be explained
Why do we only ever see one side of the moon? The moon orbits the Earth once every 27.3 days but it also turns on its own axis once during that time. The result is that we only ever see one side of the moon. However, because the moon's axis is tilted, we occasionally get views over its north and south poles. So, about 59 per cent of the moon's surface can be seen from the Earth, though only 50 per cent can be seen at any one time.
It was not until the circumlunar voyage of space probe Luna 3 in 1959 that anything was known about the far side of the moon.
What is meant by a quantum leap? A quantum leap is most commonly used to describe a sudden and highly significant or important breakthrough. However, like many sayings and expressions, its original meaning was totally different.
In 1900 German physicist Max Planck suggested that electromagnetic energy could be lost or gained only in packets, or quanta. Danish physicist Neils Bohr took this idea further and said that electrons orbiting the nucleus of an atom travelled in a precise set of orbits. Further, each orbit had its own specific energy level. If an electron moved from an orbit of high energy to one of lower energy, its excess radiation would be emitted as a single quantum of energy. Thus a quantum leap is the leap or jump of an electron from one energy level to another, which is actually the smallest movement it is possible to make.
Why is the country called Sealand not on maps? Maybe because it is so tiny. The nation of Sealand is a steel and concrete platform anchored to the bottom of the sea off the coast of Britain. It is located in the North Sea, not the English Channel as many think. Once known as Roughs Towers, it was built by the British military in what were then international waters - anywhere beyond three nautical miles from the coast - as a defence against Germany during World War II. The troops left the fort after the war, leaving it legally deserted, and easing the way for Englishman Roy Bates and his family to settle there on September 2, 1967. Proclaiming the island his own state, Bates gave the titles of Prince and Princess to himself and his wife and called his new home the Principality of Sealand.
Prince Roy's sovereignty was contested by the British Government in 1968. A British court declared the Government had no jurisdiction outside British territorial waters, thus leaving Sealand its autonomy. Since 1987, British territorial waters have extended from three to 12 nautical miles.