Lahaina Noon +2

June 2, 2006 | In Ephemerides |

A reader suggested a followup to my Lahaina noon photos, and since I’m always game for a backyard science observation, here are similar pictures taken at the solar noon (12:35pm) today, two days after the Lahaina noon. You can see the shadows are no longer straight down, and from all my reading on the subject, I know they are pointing due south at that moment. Incidentally, this proves the earth is round…

Oddly, the fence has less of a shadow because it has a top bar above the post and offset from the chain link. So at Lahaina noon, the bar casts a shadow next to the chainlink fence, but today they overlap.

The sun has moved a few minutes of a degree further north, and the pole of our clothesline is now a sundial.

Be sure to mouse-over the photos on my blog because I often put some explanations in the pop-up text.

I just noticed that the EXIF dates on all my Lahaina noon photos are false because I’ve been using an old camera whose internal clock batteries are worn out.

2 Comments »

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  1. Aloha Andy, (I hope that’s right). Thanks for the followup….the effect wasn’t as noticeable as I would have expected…but that’s what was informative about the experiment. Thanks for taking the time and courtesy to respond to a reader’s request.

    Keep Writing!…we enjoy your blog very much.

    Mahalo,

    Mike (Chicago)

    Comment by Mike — June 9, 2006 #

  2. Thanks for reading Mike, with that kind of encouragement, I’ll try to write more.

    The sun at noon will be furthest north on the summer solstice, June 21st. So if I remember about it, I’ll take a photo for comparison.

    Comment by Andy — June 9, 2006 #

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