Complex sentence: The work is notable for its role in what was called the "new astronomy", the branch of astronomy influenced especially by Nicolaus Copernicus, the only astronomer mentioned by name, although the book also draws on the theories of Johannes Kepler and William Gilbert.
Split into simpler sentences: The work is notable for its role in what was called the "new astronomy", the branch of astronomy influenced especially by Nicolaus Copernicus. Although Copernicus is the only astronomer mentioned by name, the book also draws on the theories of Johannes Kepler and William Gilbert.