Astronomy Basics: Universe and Celestial Bodies
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Questions and Answers

What is the astronomical unit of time as defined in astronomy?

  • Day (correct)
  • Hour
  • Second
  • Minute

    • Which organization adopted the astronomical system of units in 1976?

  • NASA
  • International Astronomical Union (IAU) (correct)
  • European Space Agency (ESA)
  • SpaceX

    • What is the main focus of astronomy as stated in the text?

  • Study of oceanography
  • Study of human history
  • Study of life on other planets
  • Study of the universe and celestial bodies (correct)

    • How many Julian days make up one year?

    <p>365.25 days</p> Signup and view all the answers

    What does the astronomical unit of mass represent?

    <p>Solar Mass</p> Signup and view all the answers

    How is the universe defined in the text?

    <p>Sum total of all matter and energy that exists or has existed both in space and time</p> Signup and view all the answers

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