astronomer
noun
as·tron·o·mer ə-ˈsträ-nə-mər 
: a person who is skilled in astronomy or who makes observations of celestial phenomena
Example Sentences
Recent Examples on the Web At his death, Mr. Hilts was finishing a book about Lynn Margulis, a biologist whose research into the origin of cells helped transform the study of evolution, and who was married for a time to the astronomer Carl Sagan. 
New York Times, 29 Apr. 2022 During his time as an undergraduate at Cornell University, Lai studied under the prolific late astronomer Carl Sagan. Catherine Thorbecke And Jackie Wattles, CNN, 28 Mar. 2022 Jonathan McDowell, an astronomer at the Harvard-Smithsonian Center for Astrophysics, said that space debris weighing more than 2.2 tons is typically brought down to a specific location on its first orbit of Earth. Kathleen Magramo, CNN, 26 July 2022 Of those, 286 projects were selected for its first year of operation, including about 25 led by PhD students, according to Christine Chen, an astronomer at STScI. Sumeet Kulkarni, Los Angeles Times, 25 July 2022 Nestor Espinoza, an astronomer at the institute, is showing off a crisp new graph — trust me, still charismatic — of a gas giant planet crossing in front of not just a star, but a sunspot on that star. New York Times, 12 July 2022 Néstor Espinoza, an assistant astronomer at the Baltimore institute explained the once-incredibly difficult process of observing such faraway worlds. Christine Condon, Baltimore Sun, 12 July 2022 After the war started, theoretical physicist and astronomer Oleksiy Golubov left Kharkiv to join his parents in Batkiv, a village in western Ukraine. Christina Larson, ajc, 7 May 2022 Physicist, author and Harvard astronomer, Avi Loeb, thinks Oumuamua could be a piece of alien tech rather than a space rock. Andrea Morris, Forbes, 5 May 2022 See More
New York Times, 29 Apr. 2022 During his time as an undergraduate at Cornell University, Lai studied under the prolific late astronomer Carl Sagan. Catherine Thorbecke And Jackie Wattles, CNN, 28 Mar. 2022 Jonathan McDowell, an astronomer at the Harvard-Smithsonian Center for Astrophysics, said that space debris weighing more than 2.2 tons is typically brought down to a specific location on its first orbit of Earth. Kathleen Magramo, CNN, 26 July 2022 Of those, 286 projects were selected for its first year of operation, including about 25 led by PhD students, according to Christine Chen, an astronomer at STScI. Sumeet Kulkarni, Los Angeles Times, 25 July 2022 Nestor Espinoza, an astronomer at the institute, is showing off a crisp new graph — trust me, still charismatic — of a gas giant planet crossing in front of not just a star, but a sunspot on that star. New York Times, 12 July 2022 Néstor Espinoza, an assistant astronomer at the Baltimore institute explained the once-incredibly difficult process of observing such faraway worlds. Christine Condon, Baltimore Sun, 12 July 2022 After the war started, theoretical physicist and astronomer Oleksiy Golubov left Kharkiv to join his parents in Batkiv, a village in western Ukraine. Christina Larson, ajc, 7 May 2022 Physicist, author and Harvard astronomer, Avi Loeb, thinks Oumuamua could be a piece of alien tech rather than a space rock. Andrea Morris, Forbes, 5 May 2022 See More Word History
First Known Use
14th century, in the meaning defined above
Kids Definition
astronomer
noun
as·tron·o·mer ə-ˈsträ-nə-mər
: a person who is a specialist in astronomy