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Happy Perihelion Day

Discussion in 'Environmental Discussion' started by bwilson4web, Jan 5, 2023.

  1. bwilson4web

    bwilson4web BMW i3 and Model 3

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    Source: https://www.livescience.com/perihelion-solar-storm-2023

    On Jan. 4, Earth will reach its closest point to the sun all year in an annual event called perihelion. The precise distance varies from year to year, but perihelion 2023 will see our planet orbiting 91.4 million miles (147 million kilometers) from the sun — or roughly 3 million miles (4.8 million km) closer than Earth's aphelion, its farthest point from the sun, which will occur on July 6.
    . . .    ​

    Bob Wilson
     
    #1 bwilson4web, Jan 5, 2023
    ammdb likes this.
  2. JamesBurke

    JamesBurke Senior Member

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    Hmm Tax Day, Flag Day, Some Day, and Christmas. Coincidence?

    What Is the Equation of Time?
    On average, the Sun crosses the meridian in Greenwich at precisely 12:00 GMT.
    In reality, this only happens on four days of the year, around the following dates.
    (We’ve used Greenwich as an illustration, but the equation of time applies to all locations across the world.)
    Date Time of solar noon in Greenwich
    April 15 12:00 GMT
    June 14 12:00 GMT
    September 1 12:00 GMT
    December 25 12:00 GMT

    This is when solar noon and clock noon are equal.
     
    #2 JamesBurke, Jan 5, 2023
  3. JamesBurke

    JamesBurke Senior Member

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    delete
     
    #3 JamesBurke, Jan 5, 2023
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