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This is an activity (located on page 131 of the PDF) related to sleep and circadian rhythms as well as space travel.

In this activity, dry ice and other items are used to construct a demonstration model of a comet that illustrates the comet nucleus, coma, and tails.

In this space science activity, learners explore transits and the conditions when a transit may be seen.

In this activity, learners use chocolate to explore how the Sun transfers heat to the Earth through radiation.