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Distance Between Stars

Explains that parallax is used to measure distances to objects a few hundred light years from Earth, but brightness is used for objects at greater distances.

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Earth Science Astronomy
    The Future of the Milky Way Lesson Plan
    Community Contributed
    Students research collisions of galaxies, changes in stars, and black holes then discuss the future of the Milky Way given their research. The lesson includes background information, activity, vocabulary, and assessment.
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