S3.4.3

Understands that stars differ from each other in size, temperature and age, but appear to be made up of the same elements and to behave according to the same principles; however, unlike our Sun, most stars are in systems of two or more stars orbiting around a common point.

Studies of a Population of Stars: How Bright Are the Stars, Really?

Make observations and use available data and simple calculations to correlate observations and data in the characterization of stars. In this activity, the distances to bright stars are calculated. The apparent brightness of these stars is then adjusted for distance to see which stars are intrinsically bright and which only appear bright because of their proximity to Earth.

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Studies of a Population of Stars: Distances and Motions

Make observations and use available data and simple calculations to correlate observations and data in the characterization of stars. In this activity, the distances of bright stars are calculated and their motions, in the plane of the sky and in three dimensions are illuminated.

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