Curated OER
Exploring Seasonal Shadows and Sunlight
What can shadows tell us about the changing season? Over several months, astronomy learners record length and position of an outdoor object's shadow, such as a flagpole. They apply the data to a growing hypothesis and note the...
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Lunar and Planetary Institute: Sky Tellers: Myths, Magic, Mysteries of Universe
Very nice website with excellent graphics depicting the change of the seasons and how the seasons are different between the northern and southern hemisphere. Also has a nice informational table of the spring and fall equinox and summer...
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Earth Sky: Everything You Need to Know: December Solstice 2014
Winter solstice, earliest sunset, latest sunrise. It seems that, in the Northern Hemisphere anyway, these three events should happen on the same day. Read this explanation of the changing of the seasons and learn why the winter solstice...
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Montana State University: Spring and Fall Equinox
This Montana State University site provides a simple chart on the spring and fall equinox and a description of the process.