Galileo & the Telescope
The Starry Messenger (1610)
Discoveries revealed in this book:
- The size of the stars are NOT magnified, but there are many stars unseen by naked eye.. Supports larger universe
- Moon’s topography similar to that of Earth.
- Observed sunspots (something temporary in “immutable” heavens)
- Observed 4 moons of Jupiter (motion around a different center!)
- Observed phases of Venus -- Supports sun-centered system of Copernicus and Tycho --Eliminates earth-centered system of Ptolomy.