Astronomical Unit (AU) and Earth's Orbit
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Questions and Answers

What is the average orbital distance of the Earth?

  • 152 million km
  • 147 million km
  • 150 million km (correct)
  • 155 million km

What is the point in an orbit when the object is closest to the Sun?

  • Perihelion (correct)
  • Aphelion
  • Semi-major axis
  • Elliptical orbit

In terms of astronomical units (AU), what is the distance of the Earth from the Sun at aphelion?

  • 0.938 AU
  • 1 AU
  • 0.952 AU
  • 1.017 AU (correct)

What is the range of orbital distances within the solar system in terms of kilometers?

<p>50 million km to 5 billion km (B)</p> Signup and view all the answers

How are distances within the solar system typically given?

<p>In astronomical units (AU) (D)</p> Signup and view all the answers

What is the furthest distance of the Earth from the Sun known as?

<p>Aphelion (D)</p> Signup and view all the answers

How can the mean orbital distance of each planet be expressed for better comparison?

<p>In astronomical units (AU) (B)</p> Signup and view all the answers

What is the approximate distance between the Earth and the Sun in astronomical units (AU)?

<p>1.0 AU (D)</p> Signup and view all the answers

What is the primary reason for using different units of distance in astronomy?

<p>To account for the vast range of distances involved (A)</p> Signup and view all the answers

What is the approximate distance to the star Proxima Centauri in light-years?

<p>4.2 light-years (D)</p> Signup and view all the answers

Which of the following statements about the parsec is true?

<p>All of the above (D)</p> Signup and view all the answers

What is the approximate diameter of the solar system in light-years?

<p>0.0012651 light-years (A)</p> Signup and view all the answers

Which of the following statements about light-years is true?

<p>All of the above (D)</p> Signup and view all the answers

What is the approximate distance to the galaxy GN-z11 in parsecs?

<p>$9.8 \times 10^9$ parsecs (B)</p> Signup and view all the answers

Which unit of distance is most appropriate for measuring the distance between the Earth and the Moon?

<p>Kilometers or miles (B)</p> Signup and view all the answers

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