The Sun changes its position in space therefore it cannot be regarded as being "in a condition of rest"

"The Sun changes its position in space" by August Tischner is a groundbreaking scientific analysis that challenges the traditional view of a static sun within the Copernican model. This book looks at the history of astronomy and questions whether keeping the idea of a fixed sun makes sense, especially when observations suggest otherwise. Tischner reviews the contributions of major figures like Ptolemy and Newton, arguing that their models don't fully account for the sun's movement. By advocating for a shift towards empirical observation and a break from old-fashioned ideas, Tischner prompts a transformation in astronomical thought. It argues that only by accepting the sun's motion can astronomy overcome its current limitations.