Galactic dust refers to microscopic particles of various minerals and elements that are dispersed throughout the Milky Way galaxy. This dust is thought to originate from the remnants of dying stars, supernovae explosions, and other astronomical events. Galactic dust plays a crucial role in the formation of new stars, planets, and other celestial bodies by providing the necessary material for their creation. Researchers study galactic dust to better understand the composition, distribution, and evolution of the galaxies in the universe. They use various methods such as spectroscopy and infrared imaging to analyze and characterize galactic dust particles.