Final Answer:
The final answer to the question "Who observed a nova in 1572, showing that there could be changes in the realm of the heavens?" is C) Tycho Brahe.
Step-by-step explanation:
Now, in 1572, Tycho Brahe observed a nova, which was a sudden brightening of a star. This event was significant because it contradicted the prevailing belief in Aristotle's theory of the unchanging heavens. Tycho's meticulous observations of this nova challenged the idea that celestial bodies were immutable and provided crucial evidence for changes occurring in the celestial realm.
His detailed records and precise measurements of the nova's position helped lay the groundwork for later astronomers like Johannes Kepler to develop their theories about the nature of celestial motion. Tycho Brahe's observations and dedication to precise astronomical data collection marked a pivotal moment in the understanding of the dynamic nature of the cosmos.
This event also had implications for the understanding of the universe, as it sparked a shift in astronomical thought, moving away from the classical view of a static, unchanging universe. Tycho's observations were fundamental in shaping the heliocentric model proposed by Johannes Kepler, who used Brahe's data to formulate his laws of planetary motion. Ultimately, Tycho Brahe's discovery of the nova in 1572 played a crucial role in revolutionizing humanity's understanding of the celestial realm, laying the groundwork for future advancements in astronomy and cosmology.