Astronomers study the universe, from the planets and stars in our solar system to the Milky Way and galaxy beyond. Their job is to discover how everything works together and research the origins and effects of heavenly anomalies, such as black holes, asteroids, and pulsars. What an astronomer does on a day-to-day basis will vary significantly based on their specialty. For instance, planetary astronomers study the rotation and life cycles of planets, moons, and asteroids. Stellar astronomers focus on the life cycle of stars, including the study of black holes, supernovas, nebulae, and star creation. An astronomer may also study the sun and its magnetic field and storms or focus solely on the Milky Way and galaxy.
Astronomers wishing to focus on a broader, more all-encompassing view of the universe often choose to enter the field of cosmology which involves immersion into the history of the universe, as well as active research and hypothesis on current theories, such as dark matter, string theory, and multiverses.