astronomer, uranologist, stargazer - a physicist who studies astronomy

Fred Hoyle, Hoyle, Sir Fred Hoyle - an English astrophysicist and advocate of the steady state theory of cosmology; described processes of nucleosynthesis inside stars (1915-2001)

Edwin Hubble, Edwin Powell Hubble, Hubble - United States astronomer who discovered that (as the universe expands) the speed with which nebulae recede increases with their distance (1889-1953)