1. Galileo Galilei

5. Achievements The discovery of four satellites (moons) around Jupiter

7. Achievements The discovery that Venus has phases as well as the moon

8. Achievements the discovery that the moons surface is not smooth

9. Interesting facts in 1610 he used the first microscope by looking through the telescope backwards While Galileo is said to have dropped the balls at the tower of Pisa there is no evidence to conclude he did this other than his apprentice biography of him