What substance were celestial bodies thought to be made of according to the doctrine Galileo challenged?
Answer
Aether
Aristotelian philosophy held that celestial bodies, including the Moon, were made of a perfect, unchanging substance called *aether*.
Related Questions
What was the dominant philosophical view of the Moon before Galileo's observations?Around when did Galileo commence his initial deep dives into lunar observation with his telescope?What specific topographical features did Galileo discover on the Moon's surface?What method did Galileo use to prove that lunar features were elevated structures rather than mere variations in brightness?What philosophical doctrine was challenged by the discovery of Earth-like imperfections on the Moon?What substance were celestial bodies thought to be made of according to the doctrine Galileo challenged?On what date was Galileo's first written account detailing his lunar discoveries sent in a letter?What was the title of Galileo's major work published in 1610 that detailed his findings?What did Galileo's analytical application of optics and geometry to the Moon establish, according to the text?Besides the Moon, what other celestial objects did Galileo mention observing in his early notes?