Astrophysicists are scientists who study the universe and its phenomena, focusing on the physical properties and behavior of celestial objects. They explore topics such as stars, galaxies, black holes, and the cosmic microwave background. By applying the principles of physics and mathematics, they seek to understand the origins, evolution, and ultimate fate of the universe. To conduct their research, astrophysicists use telescopes and other instruments to collect data from space. They analyze this information to develop theories about the universe, including the Big Bang and dark matter. Their work contributes to our understanding of fundamental questions about existence and the nature of reality.