Percival Lowell was an astronomer and mathematician who made significant contributions to the study of our solar system. Interestingly, there are several synonyms that are often used to describe him. For instance, he is sometimes referred to as a celestial observer due to his expertise in studying stars and planets. Additionally, some people may refer to him as a lunar expert, given his work in exploring the moon. Others may simply call him an astronomer or a mathematician, highlighting his scientific accomplishments in these fields. Regardless of the specific synonym used, it is clear that Lowell was a highly respected and influential figure in the scientific community.