Thursday, March 24, 2011

Vernal Equinox

March 24, 2011, at about 12:20pm, just after the vernal equinox

December 20, 2010 approximately 10:00 am on the winter solstice

September 21, 2010 approximately 12:00 pm at the autumnal equinox

June 21, 2010 approximately 12:00 pm at the summer solstice

The photo at the top rounds out a series of photos I've taken at the summer and winter solstice and the fall and spring equinox. You might recall that I got quite excited around the summer solstice last year when I found that within a few minutes of twelve noon on June 21, the only element of the decorative sun pattern on the south face of the house was the sun its self.

This discovery motivated me to document the four points of the seasonal rotation with a photo capturing the shading on the house. As expected the fall and spring equinox shading is pretty similar while the summer and winter solstice shadow contrasts greatly.

This information could come into play in the future if we ever decided we wanted to add shading over the windows in the warmer months to help keep the house cooler. I'm not sure if we'd ever get there but I guess we'll figure that out through experience.

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