Historical Solar System Model

Developed a detailed geocentric model and believed that planets moved in small circles that moved in larger circles. He called this "wheel-on-wheels"

• Aristotle

• Aristarchus

• Ptolemy

• Galileo

Proposed the heliocentric model. Attempted to measure the relative distances to the moon and sun.

• Aristotle

• Kepler

• Aristarchus

• Kepler

Developed a detailed heliocentric model and paved the way for what we use today.

• Galileo

• Copernicus

• Kepler

• Ptolemy

These model uses Earth as the center, are called Earth-centered.

• geocentric model

• heliocentric model

• universe model

He formulated three principles. The first law states that planetary orbits are ellipses with the sun at one focus. The second law states that planets move faster in their orbits when closer to the sun. The third law relates the distance of a planet from the sun to the time it takes to go once around its orbit.

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Tags

NGSS.HS-ESS1-4

Developed a detailed geocentric model that was used by astronomers for the next 14 centuries. He also believed that a celestial body traveled at a constant speed in a perfect circle.

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Until the time Copernicus, most scientists thought the _______ model of the solar system was correct

Who replaced circles with ellipses in a heliocentric model of the universe?

• Kepler

• Ptolemy

• Aristotle

• Copernicus

Whose geocentric model of the solar system was accepted for 1,400 years?

• Aristotle

• Ptolemy

• Copernicus

• Galileo

Who proposed the heliocentric model of the solar system, challenging the geocentric model?

• Aristotle

• Ptolemy

• Copernicus

• Galileo