The term "astronomical almanac" refers to a publication that provides information about the positions and movements of celestial bodies such as stars, planets, and moons. Some synonyms for this phrase include astronomical yearbook, star chart, celestial guide, sky atlas, and sky almanac. These publications are essential tools for astronomers, navigators, and amateur stargazers as they provide accurate and up-to-date information about astronomical events. Whether you're observing the stars for fun or conducting serious research, an astronomical almanac is an indispensable resource that can help you navigate the vastness of our universe.