The first object he observed was the moon. Through his observations he concluded that the moon's surface was very irregular and imperfect. He saw that the moon's surface had mountains and valleys.

Some common words found in the essay are:
, Galileo Earth, Jupiter Galileo, aristotleans world, moon's surface, telescope telescope,
Approximate Word count = 387
Approximate Pages = 2 (250 words per page double spaced)