Guam Day 117 - Longest Day(s) of the Year




Sunrise and Sunset data from timeanddate.com


Great link below for this image : Richhoffmanclass.com

6/19/2022 - Continuing on the astrophysics theme for today. I heard on the radio, npr all things considered, that Guam is a very unique place in the world as it relates to longest days of the year. Guam has 12 longest days of the year, all within 15 secs of length of each other. 

Putting on my Michigan or Iowa hat, correct Iowa State hat (Don't get the wrong idea), I know that the longest day of the year is on June 21st, the start of summer. So what makes Guam unique? 

Similar to yesterday, it has to do with the location on the planet between the Tropic of Cancer and the Tropic of Capricorn. Each tropical line indicates the highest or lowest point in which the sun is closest to the earth, and due to earths tilt, this point shifts throughout the year. As the earth rotates, this closest point either rises or falls depending on the relation. Guam being just below the Tropic of Cancer, means that during the summer months the closest point to the sun hangs at or above the island for a longer period. Great link below to two sites I pulled images from, check them out if you have further interest.

Last thing, because Guam is between the two tropics, the island always has close to 12 hours of sunlight year round, sadly we don't get 15 hour like our family back home, but I take the 90s daily over more light. It all averages out. 

https://www.timeanddate.com/sun/usa/guam-hagatna

Sun + Earth Image Credit: https://richhoffmanclass.com/chapter2.html

Comments

  1. CurtJune 21, 2022 at 9:38 PM

    Nice sunset pic. I miss that view. Here in Iowa we get 15 hour days in the summer and 9 hour days in the winter. Those long dark nights of winter are noticeable. Strikes me that the changing day length in Guam is barely perceptible. No SAD there.

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