An astronomer is a scientist who studies the stars, planets, and other natural objects in space.
英汉词典释义
n.
天文学者;天文学家
A new star attracted the notice of the astronomer.新发现的一颗星引起了那位天文学家的注意。Astronomers can calculate when there will be eclipses of the sun and moon.天文学家可以算出何时发生日食和月食。