Which of the following words is defined as “someone who studies the stars”? astronomer astronaut astronomy astrology

The correct answer is: astronomer.

Explanation:

An astronomer is a scientist who studies and writes about the moon, the solar system, the stars and the universe.

Astronomy is the actual branch of physics that studies celestial bodies like the ones mentioned previously.

Astrology is the belief that people's personalities are influenced by heavenly bodies.

An astronaut is a scientist trained to go into space for science and research.

i think the answer is second