Most stars are cooler than the sun. These stars, the planets, interstellar clouds and star-forming regions emit most of their radiant energy in the:
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A planet is said to be at aphelion when it is:
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Astronomers use cepheids principally as measures of what? Is it:
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A black hole with the mass of the earth would be the size of:
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The LAST manned moon flight was made in what year?
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The ring nebula is an example of a planetary nebula. It is:
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Whose paradox asks why the sky is not ablaze with starlight if the universe is infinite in extent and uniformly filled with stars?
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How many people have set foot on the Moon?
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The cosmic background radiation, a remnant of the Big Bang, is at what temperature?
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At any time we may describe the position of an inferior planet by the angle it makes with the sun as seen from the earth. This angle is called the:
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Astronomy Quiz For Cosmology Aficionados
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