 Proponents of the geophysical planet definition have published papers reviewing the planetary science literature, which shows this definition has occasionally been used by some planetary scientists for decades, including after the IAU definition was established, and that asteroids have routinely been regarded as "minor" planets though the usage is somewhat inconsistent and varies considerably.Others have expressed general support for a definition based on intrinsic values, particularly one that includes Pluto as a planet, consistent with the reasoning behind the geophysical planet definition, albeit without explicitly endorsing a specific proposed definition.Since the geophysical planet definition does not specify that planets orbit the Sun, it also applies to exoplanets.