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What four aspects of photons are measured by

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46) What four aspects of photons are measured by astronomers and what instruments do thescientists use?Answer:Difficulty: EasyLearning Objective: LO 14.3 Explain how the Hertzsprung-Russell diagram organizes ourknowledge of various stars.Section Reference: Section 14.3 The Variety of Stars
47) What are the Earth's 'northern lights' and how are they are formed?
48) How can the ashes of one stellar nuclear fire become the fuel for the next stellar nuclear fire?
49) Why do larger stars have shorter life spans?

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Section Reference, White dwarf

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