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crater – n. a large, rounded hole in the ground or on the surface of a planet or the moon

cool – adj. excellent; used to show agreement

role – n. the duties of someone or something

mission – n. an important project or program

astrogeology – n. a kind of planetary science concerned with the geology of planets, moons and asteroids

inspiring – adj. causing people to want to do or create something

distinguish – v. to make (someone or something) different or special in some way

tracking – adj. following the movement of someone or something