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在日常生活中,人们习惯于用太阳在天空中的位置来确定时间。简单地说,就是以太阳升到最高位置的时刻,定为正午12点,这样定出的时刻,叫做地方时。地方时的特点是:经度相同.地方时一样;经度不同,地方时不同,东早西晚。经度每隔15°,时间相差一小时。例如,我国首都北京的经度是东经116°,英国首都伦敦的经度是0°,北京和伦敦的正午时间相差将近8小时。当北京是烈日当空的中午时,伦敦还是黎明前的黑夜。在科技发达、往来频繁的今天,地方时用起来非常不便。为了使全世界有一个统一的时间标准,国际
In everyday life, people are accustomed to using the location of the sun in the sky to determine the time. In short, the moment when the sun rises to its highest position is set at 12 noon, so the moment set is called the place. Local time is characterized by: the same longitude. The same as the local time; different longitudes, the local time is different, the East early in the evening. Longitude every 15 °, the time difference of one hour. For example, the longitude of Beijing, the capital of our country, is 116 ° longitude, the longitude of London is 0 °, and the noon time between Beijing and London is nearly eight hours. When Beijing is the hot day at noon, London is still the night before dawn. In today's advanced technology, frequent contacts, the local time is very inconvenient to use. In order to make the world have a unified time standard, international