Celestial navigation is a method used by sailors and aviators to determine their position on Earth by observing celestial bodies such as the Sun, Moon, and stars. By measuring the angles between these celestial objects and the horizon, navigators can calculate their latitude and longitude, allowing them to navigate across vast oceans with precision. This ancient technique has been used for centuries, dating back to the times of the Polynesians and Ancient Greeks. Although modern technology like GPS has largely replaced celestial navigation, it remains a vital skill for mariners, especially in situations where electronic devices fail or are unavailable.