Solar System and astronomers

Most early astronomers placed the sun at the center of the solar system.

• True

• False

The model, which used the Earth as the center was called ____________.

• Geocentric

• Heliocentric

Who were the astronomers who agreed with the geocentric model? (two)

• Aristarchus

• Aristotle

• Copernicus

• Ptolemy

Who did explain the positions of the stars change as the Earth moves?

• Aristarchus

• Aristotle

• Galileo

Aristarchus's model was heliocentric (sun-centered).

• True

• False

Who was the first one to propose planets was moving in circles?

• Copernicus

• Ptolemy

• Keppler

Clerics did not accept Ptolemy's model

• True

• False

Copernicus created the heliocentric model using...

• A telescope to observe.

• Greek books.

Who did propose that planets move in ellipses?

• Copernicus

• Kepler

• Galileo

According to Kepler, planets move slowly when they are near the sun.

• False

• True