5/2/2023 0 Comments Crossing the line dateline![]() ![]() But Earth, of course, does not go on indefinitely eventually, a point is reached when you have to start over - or jump backward or forward in time depending on your direction of travel. The prime meridian is also where the system of 24-hour timekeeping that is called Greenwich Mean Time (GMT) originated.Īs you go east from the prime meridian, the time zones increase consecutively by one hour, or conversely, decrease consecutively by one hour as you go west. The prime meridian, at 0 degrees longitude, is the point from which all other measurements of longitude are taken. With a powerful navy, the British were well advanced in navigation and timekeeping and were using the most sophisticated devices available to reckon global position and time. was one of the most powerful and technologically advanced nations on Earth. The prime meridian was established in 1851 at a time when the U.K. Each time zone is measured as 15 degrees wide, and 360 divided by 15 is 24.Īll of these zones are numbered consecutively eastward from what is called the prime meridian, which is a line of longitude that runs directly through the British Royal Observatory in Greenwich, in the United Kingdom. The logic of dividing Earth into 24 zones is derived from the fact that the planet is a sphere, and like any sphere it can be divided into 360 equal sections, or 360 degrees. Today, with a number of significant modifications, we still use the 24-time-zone system originally proposed by Fleming. (Image credit: Getty Images/Bloomberg) (opens in new tab) People walking beneath clocks displaying global time zones in the Warsaw Stock Exchange building in Warsaw, Poland. The practicality of his system soon caught on, so that by 1900 most of the industrialized nations of the world had adopted it. Within each time zone, all clocks would be set to an average time that best represented where the sun was located in the sky. Accordingly, he proposed a system of 24 standard time zones that would span the circumference of the Earth. He wanted to make the railroad more efficient and avoid any complications resulting from the different schedules set by the different train stations, which set the time according to their local astronomical conditions, according to Encyclopedia Britannica. Fleming was a Scottish engineer who helped design the Canadian railway system. The first system of time zones was proposed by Sir Sandford Fleming in 1876, according to an article in Globe and Mail (opens in new tab), a Canadian news publication. So, to allow people to experience daylight hours in roughly the same amount - that is, to experience a normal day from sunrise to sunset - time zones are in use around the world. and i do.But humans don't travel at such speeds (unless you are on the International Space Station), and when not traveling people generally stay in one place. you know, if it was me, i take complete, utter responsibility for it. i mean, if i knew, then i would take responsibility for it. > is it possible for you to say that? > yeah. > and i take responsibility for that? > yeah. > and if you say it's probably you who caused that accident, are you able to say, yeah, you know, if i did it - and i probably did cause it - i just feel horrible about that? > uh-huh. ![]() > it was probably you that caused the accident. you swerved across and hit that other car. just not the sort of thing she ever did, she says. ![]() > despite her conviction and all that evidence and the fact she has no memory of that night, justine still claims she must have been wearing her seat belt and cannot imagine driving her car at 85 miles an hour. Don't look like serious texts, but the jury didn't look at it through your eyes. ![]()
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