noun
an astronomer who studies the evolution and space-time relations of the universe
• Derivationally related forms: ↑cosmology
• Hypernyms: ↑astronomer, ↑uranologist, ↑stargazer
• Instance Hyponyms: ↑Lemaitre, ↑Georges Henri Lemaitre, ↑Edouard Lemaitre
Useful english dictionary. 2012.