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Just as optical astronomers observe the visible light emitted by objects such as stars and galaxies, radio astronomers can also observe the radio waves emitted by these objects, as well as the radio waves emitted by gas and dust. However, radio telescopes are different from optical telescopes in important ways. In general, compared to optical telescopes, radio telescopes are larger. more curved. more expensive. smaller. This is because
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The fine detail of saturn's rings provides evidence that the planet may be: a. young b. millions of years old c. in a state of growing larger
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Just as optical astronomers observe the visible light emitted by objects such as stars and galaxies,...
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