Questions and Answers
What is the astronomical unit of time as defined in astronomy?
Day
Which organization adopted the astronomical system of units in 1976?
International Astronomical Union (IAU)
What is the main focus of astronomy as stated in the text?
Study of the universe and celestial bodies
How many Julian days make up one year?
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What does the astronomical unit of mass represent?
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How is the universe defined in the text?
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