The Day After…the Spring Equinox
This is a follow up to my previous post on what I observed on March 20, 2014.
Today (March 21, 2014), we had another beautiful sunny day, so I was able to start marking the shadows in the morning (using a blue marker).
Right away I could see the tips of the shadows were off from yesterday’s line.
So I continued to mark it without connecting the dots until mid-day.
Then through mid-day it was clearly overlapping yesterday’s straight line.
And then it began to veer off the black line again in the early evening hours.
And here’s a straight edge aligned to yesterday’s black straight line. First from the perspective of the morning shadows…
And then from the evening shadows’ perspective…
It seems to me that from this point forward the arcs are going to continue to bend more as the sun travels further north creating more prominent arcs. I will keep marking this table periodically and post another update in about 30 days (or sooner if something unexpected happens).
Messyanic
Homesteading wife, mother of three young adults, and perpetual Bible student, continually taking the road less traveled. (@messyanic)
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5 Comments
Greg Broussard
I could be wrong, but I will check and see if I sent you the correct links
greg
Fabian
Good work!! It’s very interesting. Do you continue with this experiment?
Isha
I’ve been periodically checking my sundial table and seeing arcs, but I was unable to track the summer solstice or the days before and after due to bad weather conditions. I plan to keep further watch with special attention around the time of the fall equinox.
Fabian
Here is something similar: http://www.uwrf.edu/AboutUs/Buildings/Sundial/DesignOfTheRichardSwensenSundial.cfm
Isha
Cool reference, Fabian. Thank you! 😀 I like all the explanations and photos given.