Early Astronomy 2A

What does "geocentric" mean?

• Earth-centered

• Sun-centered

• Moon-centered

• Star-centered

What did most early Greek astronomers believe about the position of the Earth in the universe?

• The Earth is at the center of the universe.

• The Sun is at the center of the universe.

• The Moon is at the center of the universe.

• Jupiter is at the center of the universe.

Who was Aristotle?

• A Roman Emperor

• A Greek Philosopher

• An Egyptian Pharaoh

• A Chinese Scholar

What were Aristotle's ideas based on?

• Experiments

• Speculations (guesses)

• Observations

• Mathematical proofs

What did Aristotle believe about the universe?

• It centers around the Sun in an elliptical orbit

• It centers around the Earth in a perfect circle

• It is infinite and has no center

• It is a flat disc

Whose ideas were believed by the church and not tested for 1,000 years?

• Galileo

• Copernicus

• Newton

• Aristotle

Who believed that planets move in small circles that move on bigger circles?

• Ptolemy

• Copernicus

• Galileo

• Newton

What did Ptolemy believe about the movement of planets?

• Planets move in straight lines.

• Planets move in small circles that move on bigger circles.

• Planets move in random patterns.

• Planets do not move at all.

What did Ptolemy try to predict?

• The size of the planets.

• The distance of planets from the Sun.

• The order of the planets.

• The color of the planets.

What did Ptolemy create to show how known planets and the sun orbited Earth?

• A telescope

• A map of the stars

• An organized chart

• A model of the solar system