1) which scientist's work did Copernicus contradict?

2) what made it difficult for him to prove his theory?

1) Copernicus contradicted the work of the ancient Greek astronomer and mathematician, Claudius Ptolemy. Ptolemy proposed the geocentric model, which stated that the Earth was the center of the universe and all celestial bodies, including the Sun, revolved around it.

To find the answer to this question, you can follow these steps:

Step 1: Search for information about Copernicus and his theory.
Step 2: Look for details on Copernicus's ideas that went against the prevailing belief at the time.
Step 3: Identify the theories or scientific ideas that were prevalent during Copernicus's time and compare them to his work.
Step 4: Once you have found the conflicting theories, determine which specific scientist's work Copernicus contradicted. In this case, it is Claudius Ptolemy.

2) There were several factors that made it difficult for Copernicus to prove his theory, known as the heliocentric model.

To find out what made it difficult for Copernicus to prove his theory, follow these steps:

Step 1: Search for information on Copernicus and his heliocentric model.
Step 2: Look for details on the challenges or obstacles he faced in presenting and proving his theory.
Step 3: Identify the reasons or factors mentioned that made it challenging for Copernicus.
Step 4: Some of the difficulties Copernicus encountered include:
- Lack of observational evidence and technology: Copernicus did not have access to accurate measurements or advanced telescopes to provide definitive proof for his theory.
- Resistance from the religious and scientific community: Copernicus's heliocentric model challenged the religious and scientific beliefs of the time, leading to opposition and skepticism from various quarters.
- Lack of widespread acceptance: Copernicus's theory was not immediately accepted by his contemporaries and took several decades and subsequent observations to gain broader recognition.

By following these steps, you can find the information related to the challenges faced by Copernicus in proving his theory.