Astronomy is the study of everything outside of the Earth’s atmosphere, such as planets, stars, asteroids, and galaxies, as well as their attributes and interactions. Astronomers conduct their studies and observations. Astrology, on the other hand, is the theory that the positions of the stars and planets influence how events on Earth unfold. Astronomy is the area you’re considering if you’re interested in the solar system and planets, other celestial objects like asteroids and comets, other galaxies and the rest of the universe, what makes up space, and the potential of extra-terrestrial life or space travel.