Tentai Kansoku is a Japanese term that translates to "celestial observation." It refers to the practice of observing celestial bodies, such as stars, planets, and other astronomical phenomena. This activity has been an important part of various cultures, contributing to advancements in astronomy and navigation. In Japan, Tentai Kansoku has historical significance, with ancient scholars studying the night sky to create calendars and predict seasonal changes. Today, it continues to inspire both amateur and professional astronomers, fostering a deeper understanding of the universe and our place within it.