Perseverance helped Cecilia become a successful astronomer through constant studies and researches which led to her discovering that the Sun and the other stars are composed almost entirely of hydrogen and helium.
Who is an Astronomer?
This can be defined as a scientist who studies the stars, planets, and other natural objects in space.
Cecilia became an astronomer due to persistent research works and findings which eventually led to her discovering the constituent of the Sun and other stars.
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