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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.

“Exploring the Solar System: Big Sun, Small Moon” is a hands-on activity that explores the concept of apparent size and allows visitors to experience this phenomena using familiar objects—a tennis bal

In this activity, learners will measure the length of their shadow from the Sun and compare it three to four months later.

In this online interactive challenge, learners choose items to represent the Earth or solar system, then determine other items to represent the Moon, or Milky Way based on their relative size.