Exploring Our Solar System

By Rachael Wahba

Pre-1900 Galileo Galilei

Born on February 15, 1564, in Pisa, Italy. Galileo Galilei was a mathematics professor who made pioneering observations of nature with long-lasting implications for the study of physics. He also constructed a telescope and supported the Copernican theory, which supports a sun-centered solar system. Galileo was accused twice of heresy by the church for his beliefs, and wrote books on his ideas. He died in Arcetri, Italy, on January 8, 1642.

Dates of Discoveries:

400 Years Ago-discovered Jupiter's moons.

1609-1610- The moon has a rough surface.

1609-1610- The milky way has many stars.

What were the discoveries?

1. 400 Years Ago, he discovered the 4 moons for Jupiter (Callisto, Europa, Ganymede, Lo)


2. 1609-1610 The Earths Moon has a rough surface not a full spherical shape.


3.1609-1610 The Milky Way has many different shapes and sizes of stars.

Technology used at the time:

Galileo Galilei used his own telescope.

(I couldn't find any other technology)

If it wasn't for Galileo us Humans would be believing in the wrong information about the solar system.