What feature of the Moon immediately blurred the line between the "perfect" heavens and the "imperfect" Earth?
Answer
Its cratered and mountainous surface
When Galileo looked at the Moon, he found it to be cratered, mountainous, and messy, making it look remarkably like the Earth and thus contradicting the concept of perfect celestial bodies.
Related Questions
Where did the initial invention of the telescope likely occur around 1608?According to the prevailing worldview influenced by Aristotle and Ptolemy, what characterized the celestial realm?What feature of the Moon immediately blurred the line between the "perfect" heavens and the "imperfect" Earth?What significant celestial observation involving Jupiter challenged the geocentric model?What did Galileo's observation of Venus displaying a full cycle of phases confirm?In which publication did Galileo make public the observations supporting the Copernican theory?Beyond astronomical location, what fundamental conflict did the telescope's findings immediately provoke?How did the rapid spread of telescope technology bolster the credibility of the new findings?Besides astronomical contemplation, what practical advantage made the telescope attractive to secular interests?What was the most enduring, immediate impact of the telescope on scientific methodology?