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Question
The ________ hypothesis is that the Earth does not occupy any special place in the universe.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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If the value of H is doubled, it would also double the age of the universe.
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The cosmological principle is the ultimate extension of the Copernican principle to the entire universe, in that there is no center at all.
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When dark matter was first discovered, some astronomers thought that Ωo was greater than one from the extra gravity, favoring what type of universe?
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Name each of the factors in the Drake equation.
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What is meant by the idea life on Earth had an "interstellar origin"?
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What do we mean by "life as we know it"?
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Why does SETI concentrate on the water hole?
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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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Outside our Earth, the most likely places for life are the planet ________ and jovian moon ________.
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Conducted in 1953, the ________ experiments were designed to show what types of complex molecules might have formed in the Earth's primitive environment.
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An extraterrestrial observer would pick up the strongest radio signals when
A) the Earth was at perihelion.
B) North America was either rising or setting for the observer.
C) North America was directly in front of the observers.
D) at new or full moon.
E) Saturday Night Live is on.
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Most SETI searches are done at
A) X-ray wavelengths.
B) infrared wavelengths.
C) visual wavelengths.
D) radio wavelengths.
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In Drake's equation, which of the following is the closest estimate for the number of stars that are formed in the Milky Way Galaxy?
A) a star a day
B) a star a month
C) a star a year
D) a star a decade
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Which type of molecules, vital to our life, were found to have survived a fiery descent to Earth on meteorites?
A) amino acids
B) DNA
C) lipids
D) sugars
E) vitamins
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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
E) 30 million years ago
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What important molecules of life did Miller and Urey brew up?
A) RNA
B) fatty acids
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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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Around Sun-like stars, we have, to date, only found Jupiter-like planets.
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Of the billions of possible combinations of atoms into organic molecules, only about 1500 actually occur.
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Earth-like planets have been observed outside our solar system orbiting in the habitable zone.