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How do you know without a calendar that we are heading towards fall?

Posted/updated on: August 13, 2012 at 12:32 am

The best way is to note the sun angle at solar noon. Solar noon here is about 1:21 p.m. CDT; the sun angle decreases by about one degree every four days. What you could do is this: place a stake in the ground where it gets full sun, and measure the length of the shadow; then four days later, come back and it will be a little longer, and it will continue to lengthen until December 21.
The sun angle above the horizon at solar noon on June 21 is atout 80 degrees; on December 21 at solar noon (12:21 p.m. then because we’re back on standard time) is about 36 degrees.
RKP


How do you know without a calendar that we are heading towards fall?

Posted/updated on: August 13, 2012 at 12:32 am

The best way is to note the sun angle at solar noon. Solar noon here is about 1:21 p.m. CDT; the sun angle decreases by about one degree every four days. What you could do is this: place a stake in the ground where it gets full sun, and measure the length of the shadow; then four days later, come back and it will be a little longer, and it will continue to lengthen until December 21.
The sun angle above the horizon at solar noon on June 21 is atout 80 degrees; on December 21 at solar noon (12:21 p.m. then because we’re back on standard time) is about 36 degrees.
RKP


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