The "Astronomisches Jahrbuch," or "Astronomical Yearbook," is a comprehensive annual publication that provides detailed information about celestial events, astronomical phenomena, and important dates in the field of astronomy. It serves as a valuable resource for both amateur and professional astronomers, offering data on planetary positions, eclipses, and other significant occurrences in the night sky. First published in Germany in the early 19th century, the yearbook has become a trusted reference for astronomical calculations and observations. It includes charts, tables, and articles that help readers understand the movements of celestial bodies, making it an essential tool for anyone interested in astrophysics and observational astronomy.