Overview
Astrophysics is a branch of science that applies the principles of physics and chemistry to study astronomical objects and phenomena, including the universe. It examines the nature of celestial bodies, such as stars, galaxies, and planets, and their properties like luminosity, density, and chemical composition. Astrophysicists like James Keeler, Neil deGrasse Tyson, and Brian Greene have contributed significantly to our understanding of the universe, often collaborating with experts from NASA, the European Space Agency, and other organizations like the Harvard-Smithsonian Center for Astrophysics.