These discoveries were arguably his most important, and certainly those for which history has best remembered him. ... By adding the length of a shadow and the angle at which the sun's rays hit it, Galileo used the shadow method to measure the height of mountains on the moon (Moore 156). ... Because the sun only lights up half of a planet at a time, Venus could never be seen as a full, or even half disk, according to Ptolomey's geocentric model of the universe. ... This could only mean that it moved around the sun and not the Earth? ... The simplest explanation is that this pla...

• Word Count: 4135
• Approx Pages: 17
• Grade Level: High School

As Drake explains " the silencing and punishment of Galileo toward the end of a life devoted to scientific inquiry was an event of profound significance for our cultural history" (pg. iii). ... I bring up the fact that Bruno a contemporary of Galileo was sentenced to death for supporting Copernican Sun centred system as proof of his courage. ...

• Word Count: 3037
• Approx Pages: 12
• Grade Level: Undergraduate