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This is an activity that uses numerical information to help dispel the prior conception that distance from the Sun causes the seasons on Earth. Learners will examine two images of the Sun, taken six months apart, measure the apparent diameter of the Sun over the course of twelve months, calculate the approximate Earth-Sun distance for each observation, and graph the data. This is Activity B-8 of Universe at Your Fingertips 2.0: A Collection of Activities and Resources for Teaching Astronomy DVD-ROM, which is available for purchase.
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