How We Figured Out That Earth Goes Around the Sun

Which model suggested that the Earth is at the center of the universe?

• Heliocentric model

• Geocentric model

• Elliptical model

• Archemedian model

What was a major flaw for the geocentric model in explaining planetary motion?

• Planets always appeared to move at the same speed.

• Planets sometimes changed brightness and appeared to move in different directions.

• The Earth was observed to be flat, contradicting the model.

• The moon was observed to orbit the sun, not the Earth.

Who proposed the heliocentric model, suggesting the Sun was at the center of the universe?

• Galileo Galilei

• Johannes Kepler

• Nicolaus Copernicus

• Isaac Newton

What did Johannes Kepler realize?

• The planets moved in elliptical orbits.

• The planets moved in circular orbits.

What observation by Galileo provided strong evidence against the geocentric model?

• Venus had rings similar to Saturn.

• Venus had moons orbiting it.

• Venus exhibited phases like the Moon, appearing larger when new and smaller when full.

• Venus was much hotter than previously thought.

The heliocentric model is perfectly correct.

• True

• False