The scientist most likely to study a meteor flying through outer space is an astronomer.

Here's why:

* Meteors are celestial objects: Astronomers specialize in studying celestial objects like stars, planets, comets, and yes, meteors.

* Meteors are related to asteroids and comets: Astronomers study the origins and behavior of asteroids and comets, which are the sources of meteors.

* Meteors provide information about the solar system: Astronomers analyze the composition and trajectory of meteors to learn more about the early solar system and the materials it was formed from.

While other scientists like physicists or geochemists might study specific aspects of meteors, it's primarily the astronomer who takes the lead in understanding these celestial objects.