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Question
Fraunhofer was the German astronomer who first noted ________ lines in the Sun's spectrum.Answer
This answer is hidden. It contains 10 characters.
Related questions
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If the inflation theory is correct, the geometry of the universe is flat and Euclidean.
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Compare the Copernican principle with the assumptions of mediocrity.
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In the habitable zone, surface water must be at least partially ________ in phase.
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An extraterrestrial observer would pick up the strongest radio signals when
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A) a star a day
B) a star a month
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B) DNA
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How long ago did multicellular life forms appear in the fossil record?
A) 4.5 billion years ago
B) 3.8 billion years ago
C) one billion years ago
D) 63 million years ago
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What important molecules of life did Miller and Urey brew up?
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Thanks to the far-flung Voyager and Pioneers, knowledge of our presence has now spread out over 30 light years.
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The water hole lies between 18 and 21 cm in wavelength in the radio spectrum.
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Earth-like planets have been observed outside our solar system orbiting in the habitable zone.