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Asteroids and comets  
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Higher education  
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Informative text  
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This slide set focuses on evidence of a binary star that passed within 0.8 ly of our solar system. It is one of a series of short, topical presentations on new developments from NASA astrophysics missions, relevant to introductory astronomy topics.... (View More)

In this online interactive, learners will explore how scientists learn about the composition of an asteroid by studying energy and neutrons that emanate from it. Includes audio (and transcription) explaining the diagram.