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Longer Evenings, but Darker Mornings

  • 25-12-2012 9:07pm
    #1
    Poulgorm
    Registered Users, Registered Users 2 Posts: 813 ✭✭✭


    December 21st - shortest day of the year. After that date, sunset immediately starts to gets later - but sunrise continues to occur later, for a few weeks.

    Why the delay in earlier sunrises?


Comments

  • #2
    juneg
    Registered Users, Registered Users 2 Posts: 1,083 ✭✭✭juneg


    It has to do with the tilted position of the earth on its axis. This means the Earth doesn't go around the Sun in a perfect circle. And because we are on a high latitude, we dont get the benefit of the early sunrise, just the later sunset.


  • #3
    Capt'n Midnight
    Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 93,567 Mod ✭✭✭✭Capt'n Midnight


    https://en.wikipedia.org/wiki/Equation_of_time

    310px-Equation_of_time.svg.png


  • #4
    misnormer
    Registered Users, Registered Users 2 Posts: 59 ✭✭misnormer


    Poulgorm wrote: »
    December 21st - shortest day of the year. After that date, sunset immediately starts to gets later - but sunrise continues to occur later, for a few weeks.

    Why the delay in earlier sunrises?

    the azimuth angle of the sun from the east is at a lower than in the west due to the tiltation of the earths rotational axis.

    in ireland 6th january is a non-scientific date when an earlier sunrise is noticed.


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