Unraveling the Cosmos

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Questions and Answers

Which ancient Greek philosopher calculated the Earth's circumference using angles and distances?

  • Pythagoras
  • Aristarchus of Samos
  • Archimedes
  • Eratosthenes (correct)

How did Aristarchus of Samos estimate the distances to the Moon and the Sun?

  • By using a crystal sphere
  • By measuring the angles between the Earth, Moon, and Sun (correct)
  • By calculating the Earth's circumference
  • By observing the parallax of the Moon

What is parallax used for?

  • Measuring the Earth-Sun distance
  • Estimating the distance to the Moon (correct)
  • Calculating the Earth's circumference
  • Determining the size of celestial objects

Why did determining distances to other planets require knowing the Earth-Sun distance precisely?

<p>To accurately measure distances to other planets (C)</p> Signup and view all the answers

Why did people believe stars were holes in a crystal sphere?

<p>Because it wasn't clear how big the sphere was (A)</p> Signup and view all the answers

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