Blog Description - A collection of media articles and tweets highlighting 1) the dangers of sun glare while driving, 2) the issue of shadowing due to urban development, and 3) random fun sun facts.

Blog Purpose and Disclaimer - This blog compiles and shares public interest stories in an effort to educate and raise awareness. Sources, credits and links are provided for articles and images, and it is my belief that this blog complies with the fair dealing exception in Canada's Copyright Act. However, if you wish your item removed, simply ask.

Cheers, Ralph Bouwmeester

Saturday, March 19, 2016

How quickly does the Sun move?

Did you know...

1) ...the sun's altitude changes most rapidly during early morning and late afternoon hours.

For Toronto...

...typically about 1 degree per hour around noon
...up to about 11 degrees per hour early and late in the day

...the rate of change is greater in summer than winter.

2) ...the sun's direction changes most rapidly around noon.

For Toronto...

...typically about 10 degrees per hour early and late in the day
...up to about 38 degrees per hour at noon on June 21

...the rate of change is much greater in summer than winter.

Cheers, Ralph

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