3-D Model of the Big Dipper Curriculum Materials for grades Kindergarten through 8 In outer space, you might not recognize the Big Dipper. The stars that form this constellation exist in 3-D not 2-D—so the star pattern changes with your viewpoint. Take another look at the Big Dipper.
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		Gathering Light Curriculum Materials for grades Kindergarten through 8 While refracting and reflecting telescopes use different means of collecting light, the same principle applies to both—the bigger the aperture, the more light collected.
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		White Light and Colored Light Curriculum Materials for grades Kindergarten through 4 When does mixing every color under the rainbow create pure white rather than a murky brown or black? When light, not paint, is the medium—and you're subtracting, not adding, color.
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