Astronomy Basics: Universe and Celestial Bodies

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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?

365.25 days

What does the astronomical unit of mass represent?

Solar Mass

How is the universe defined in the text?

Sum total of all matter and energy that exists or has existed both in space and time

Explore the fundamental concepts of astronomy, including the study of the universe, celestial bodies, galaxies, and space structure. Learn about the vast expanse of the universe and its components such as stars, solar systems, and galaxies.

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