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Science - It's life Jim but not as we know it...

Discussion in 'The Premier League' started by Treble, Feb 4, 2022.

  1. duggie2000

    duggie2000 Well-Known Member

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    Time Zones are so we can communicate with other countries knowing their actual time and BST was introduced so trains could run to a timetable because otherwise a train leaving Paddington at 8-00am would actually be leaving at 9-00am in Cornwall
     
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  2. luvgonzo

    luvgonzo Pisshead

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    Which are man made time zones, thanks.
     
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  3. duggie2000

    duggie2000 Well-Known Member

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    You are tiresome, lets make it simple for you, the sun rises 4 hours later in New York than here and 7 hours later in LA so time zones are in place for timetables to be accurate, but if you see the sunrise in London and then four hours later in New York you have time traveled and when you return you lose 4 hours so you have travelled back in time
     
    #2563
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  4. luvgonzo

    luvgonzo Pisshead

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    In man made time yes.
     
    #2564
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  5. Archers Road

    Archers Road Urban Spaceman

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    Time is relative. It passes more slowly in close proximity to massive objects (like the earth), and more quickly in space. So astronauts age more quickly than they would on earth.

    And in close proximity with a black hole, time slows to almost nothing, which is why theoretically (no one has yet tried this in practice) you can never pass the event horizon of a black hole in either direction.
     
    #2565
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  6. brb

    brb CR250

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    I love the way you hear him excited then when the camera goes to him he's silent and it dawns shhite just got real...

     
    #2566
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  7. brb

    brb CR250

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    I don't believe this would work, but it gives you the logic. I think Brian Cox saw two sunsets, but he had to do it at speed in a jet. It's on Iplayer, so I can't put that up.

     
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    Last edited: Nov 14, 2024
  8. brb

    brb CR250

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    @duggie2000

    AI Overview

    Flying is not time travel as we typically think of it, but it does involve a slight difference in the passage of time:
    • Time dilation
      The faster you travel, the slower time passes for you. This is called time dilation. For example, a transatlantic flight will cause your watch to be a few millionths of a second behind a watch left on the ground.
    • Clocks on airplanes
      Clocks on airplanes and satellites tick at a different rate than those on Earth.
    • Zulu time
      Pilots use Zulu time, which is based on the Prime Meridian in Greenwich, England, instead of local time.
    While time travel is a common theme in science fiction, no one has ever demonstrated the ability to travel back and forth in time. However, some say that relativity suggests that it's possible to travel into the future by traveling at speeds close to the speed of light or spending time in a strong gravitational field.

    So what is Zulu time:

    Zulu (Zulu time) is used in the military and navigation for timekeeping purposes to avert confusion when coordinating with countries using other time standards. Zulu time is generally used as a term for Universal Coordinated Time (UCT), sometimes called Universal Time Coordinated (UTC) or Coordinated Universal Time (but abbreviated UTC).

    Zulu time was created to eliminate the confusion caused by different time zones. It is also sometimes referred to as GMT, or Greenwich Mean Time, although this usage is discouraged by the U.S. military because of its ambiguity.

    How is Zulu time measured?

    In military shorthand, the letter Z follows a time expressed in UTC, or the time at longitude 0 degrees 0 minutes -- the prime meridian or longitudinal line that separates east from west in the world geographical coordinate system.

    This line of longitude is based on the location of the Royal Observatory in Greenwich, England, near London. Zulu is the radio transmission articulation for the letter Z.

    Zulu time is measured in hours, minutes and seconds using the Gregorian calendar, military time divisions of hours and minutes, and a 24-hour format.

    Zulu timekeeping starts at midnight instead of 12 noon or 12 midnight, which is the standard reference for most other time zones.

    Why use Zulu time?

    The U.S. military still uses Zulu time in its radio transmissions and documentation because of the confusion that can result when trying to coordinate activities with other countries that use different time standards.

    Zulu time eliminates this confusion by providing a single standard that can be applied universally.

    Interestingly, the use of Zulu time in aviation has led to the widespread practice among pilots of referring to local time by its offset from Zulu time.

    For example, pilots flying from Los Angeles to New York might refer to their departure time as "two zero niner zulu" (0900 UTC/GMT) and their arrival time as "one five niner zulu" (1545 UTC/GMT).

    It's also worth noting that the use of Zulu time has also gained popularity in the shipping industry for the same reason -- to avoid confusion with international shipping vessels.

    Zulu vs. time zones

    Time zones are measured as the number of hours offset from GMT. Thus, the Zulu time zone is expressed as UTC+0000, or Zulu time is zero hours ahead of GMT.
    When comparing Zulu time to different time zones, the abbreviations and differences in time are typically expressed in a format like the following:
    • Eastern Standard Time (EST): UTC-0500 or 5 hours behind GMT.
    • Central Standard Time (CST): UTC-0600 or 6 hours behind GMT.
    • Mountain Standard Time (MST): UTC-0700 or 7 hours behind GMT.
    • Pacific Standard Time (PST): UTC-0800 or 8 hours behind GMT.
    It's important to note that these will change in regions that observe daylight saving time in the summertime.

    Credit: https://www.techtarget.com/whatis/definition/Zulu-Zulu-time

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    #2568
  9. Sucky

    Sucky peoples champ & forum saviour

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    Waiting until I can download a free pdf
     
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  10. Sucky

    Sucky peoples champ & forum saviour

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  11. duggie2000

    duggie2000 Well-Known Member

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    Zulu Times Sahhhh; bloody thousands of em
     
    #2571
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  12. duggie2000

    duggie2000 Well-Known Member

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    I think that confirms/explains what was I trying to say to Luvvie in a paragraph
     
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  13. duggie2000

    duggie2000 Well-Known Member

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    Lucky Bastard
     
    #2573
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  14. Sucky

    Sucky peoples champ & forum saviour

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    #2574
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  15. brb

    brb CR250

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    #2575
    Last edited: Nov 14, 2024
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  16. FosseFilberto

    FosseFilberto Pizzeria Superiore and some ...
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    Science and Religion share one fundamental facet ... both are hugely based on conjecture...

    Philosophicalfosse
     
    #2576
  17. FosseFilberto

    FosseFilberto Pizzeria Superiore and some ...
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    Or put the pleasure garden adjacent to the sewerage works when designing women ... <whistle>
     
    #2577
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  18. FosseFilberto

    FosseFilberto Pizzeria Superiore and some ...
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    Yeah ... but I can do all of that with rum ... and at a fraction of the cost ...
     
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  19. FosseFilberto

    FosseFilberto Pizzeria Superiore and some ...
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    Loved that film ... especially the sing off!
     
    #2579
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  20. duggie2000

    duggie2000 Well-Known Member

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    #2580
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