Geocentric and Heliocentric Lesson

Geocentric and Heliocentric Lesson

Aristotle

He thought Earth was the center of the universe and that the Sun, Moon, planets, and all the fixed stars revolved around it. Aristotle's ideas were widely accepted by the Greeks of his time.

Multiple Choice

He thought Earth was the center of the universe and that the Sun, Moon, planets, and all the fixed stars revolved around it. His ideas were widely accepted by the Greeks of his time. Who was he?

• Ptolemy

• Copernicus

• Aristotle

• Galileo

Copernicus

• Copernican system, in astronomy, model of the solar system centered on the Sun, with Earth and other planets moving around it, formulated by Nicolaus Copernicus, and published in 1543. It correctly described the Sun as having a central position relative to Earth and other planets.

Multiple Choice

I formed the model which positioned the Sun near the center of the Universe, motionless, with Earth and the other planets orbiting around it in circular paths. Who am I?

• Aristotle

• Copernicus

• Galileo

• Ptolemy

Galileo

Using his telescope, Galileo made many observations of our Solar System. He came to believe that the idea that the Sun and other planets orbited around the Earth was not correct. Galileo felt that an astronomer named Copernicus had a better idea. Copernicus believed the Earth and other planets moved around the Sun.

Ptolemy

• He believed in a Earth-centered," or "geocentric" Ptolemy thought that all celestial objects — including the planets, Sun, Moon, and stars — orbited Earth. Earth, in the center of the universe, did not move at all.

Geocentric Model

In the geocentric system, the Earth is considered to be the center of the solar system. The Moon, the planets, the Sun, and the stars all rotate around the Earth (which stays still), with uniform circular motion. They compose the heavens, which are considered to be ethereal and unchanging.

Heliocentric Model

• The Heliocentric Model is the astronomical model in which the Earth and planets revolve around the Sun at the center of the Universe.

Multiple Select

Which has the Sun at the center of the solar system?

• Heliocentric

• Geocentric

How was the Heliocentric model proven?

In 1543, Nicolaus Copernicus detailed his radical theory of the Universe in which the Earth, along with the other planets, rotated around the Sun. ... Galileo discovered evidence to support Copernicus' heliocentric theory when he observed four moons in orbit around Jupiter.

Multiple Select

Which theory has Earth in the center?

• heliocentric

• geocentric

Solar System

The order of the planets in the solar system, starting nearest the sun and working outward is the following: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune.

Multiple Select

Is Pluto a planet?

• Yes

• No