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| What did people use to tell time? |
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Enable astronomers to observe many more stars than they could see with their eyes alone
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| Stars produce energy that radiates into space, traveling in waves called |
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| The entire range of radiant energy carried by electromagnetic waves is the..... |
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| Electromagnetic waves can transfer energy through matter or through s vaccum, such as space |
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| Eectromagnetic waves w/short wavelengths hav higher frequencies nd waves w/longer wavelenghths have fewer frequencies |
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| Humans observe only the ____ light on the electromagnetic specrum |
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