Science

What is the study of stars, planets and galaxies called?

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What type of circulatory system pumps blood into cavities instead of through vessels?
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Which of these is defined as "part of the electromagnetic spectrum that contains visible light"?
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Which of these is a scientific definition for the term "matter"?
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What is the cargo of a spacecraft called?
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What is the rhythmic repetition surrounding the planetary day called?
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When we add two forces, what do we call the answer?
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What is the stalk of a stamen called?
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Which of these scientific terms is defined as the solid surface layer of a planet or moon?
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