What concept did Herschel propose regarding the shape of the Milky Way?

Answer

It was a flattened, disk-like system.

Through systematic mapping using star gauges, Herschel developed the foundational idea that the Milky Way galaxy possessed a flattened, disk-like configuration.

What concept did Herschel propose regarding the shape of the Milky Way?
discoveryscientistUranusAstronomercontribution