1. ANCIENT ASTRONOMERS THEIR DISCOVERIES AND THEORIES
Wonder.s

2. ANCIENT ASTRONOMER ARISTOTLE
Proved that the earth was a circle
Believed that the earth was the center of the universe
He thought the earth was the center of the universe because if we were orbiting around the sun wouldn’t the stars shift position though out the year
The technology to prove his theories did not exist at the time
He believed planets went in a circle around the sun

3. ANCIENT ASTRONOMER PTOLEMY
Ptolemy believed that the earth was in the center of the universe
Ptolemy was a doctor, mathematician, geographer and astronomer

4. ANCIENT ASTRONOMER AL-KHWARIZMI
Al-Khwarizmi invented algebra
He developed this mathematical device completely in words
The formula he created can tell were the sun, moon and planets were positioned in the sky

5. ANCIENT ASTRONOMER COPERNICUS
He began saying that the sun was the center of the universe and that the earth would orbit the sun
This revolutionary idea was not popular with the church
Other people such as Galileo helped to prove Copernicus was correct
This idea was called Heliocentric system
He was not the first one to think the sun was the center of the our solar system
Starwatchers believed that the sun was in the center of the universe too

6. ANCIENT ASTRONOMER GALILEO
Galileo is a Italian scientist
He invented a 30x telescope
He saw craters ,mountains and valleys of the moon
He noticed huge numbers of stars making up the milky way
He discovered that four moons were orbiting Jupiter
The four moons orbiting Jupiter are called the Galilean moons because Galileo discovered them and proved that they orbited Jupiter
In 1633 Galileo was put under house arrest because of all his new discoveries which frightened the church

7. The theories of our ancient astronomers and how they changed over time.

8. Thanks for watching and learning more about
ANCIENT ASRONOMERS