1. Astronomers

2. Copernicus

3. Copernicus The first to theorize that the Earth
revolved around the Sun
Came up with theory based on
observations made by the naked eye

4. Copernicus Did not publish his observation until
near his death because he feared
persecution from the catholic church

5. Copernicus Those before him believed in the:
Geocentric Model – Earth was the center
of the universe and everything revolved
around it

6. Copernicus: theorized the-
Heliocentric Model: stated that the Sun was
the center of the universe and that the Earth
revolved around it

7. Galileo

8. Galileo The telescope was invented by a Dutch
lens maker, but Galileo was the first to
point it towards the sky

9. Galileo - Discoveries Found the Moon to be full of craters
Four moon revolving around Jupiter
Discovered that Venus had phases
similar to our moon…

10. Galileo - Discoveries The discovery of Venus’ phases
confirmed Copernicus’ heliocentric
model

11. Galileo Was put on trial by the catholic church
after publishing his findings
Was almost burned at the stake

12. Galileo Was put on trial by the catholic church
after publishing his findings
Was almost burned at the stake

13. Galileo His observations were limited due to his
use of a refracting telescope:

14. Galileo His observations were limited due to his
use of a refracting telescope: uses two
Lenses to magnify objects being viewed

15. Galileo His observations were limited due to his
use of a refracting telescope: uses two
Lenses to magnify objects being viewed

16. Astronomer Time Line