The belief in a spheroid planet is hardly Satanic, it was proposed by Greek philosophers who had no contact with the Jewish cosmology and of course no contact with a yet to be Christianity.

Before you call the Greeks Satanic for being Pagans you might want to consider the influence of Greek thought on Christian theology and the New Testament itself (written in common Greek) starting with Paul and later Augustine.

Furthermore, Copernocus's heliocentric model does not propose the Sun at the center of the cosmos, only at the center of the Solar System.

Such a theory based on his empirical data is not Sun worship or evidence of Sun worship, let alone Satanism.

Just because people don't accept Genesis cosmology doesn't make them Satanists.

How would the ancient world have had empirical evidence of a solid firmament anyway?

At best it would have been an inference drawn from observation, just like modern astronomy.