Here's what they used:
* Naked Eye Observations: The most basic tool was simply observing the night sky with the naked eye. Ancient astronomers developed systems for tracking the movement of stars and planets based on their relative positions and the time of year.
* Armillary Spheres: These were models of the celestial sphere, allowing astronomers to visualize the positions of stars and planets. They were used to track the movements of celestial bodies and predict their future locations.
* Astrolabes: These were handheld instruments that used a combination of a graduated circle and a movable pointer to measure the altitude of stars and planets. Astrolabes were used for navigation, timekeeping, and astronomical observation.
* Gnomons: These were simple vertical poles or pillars used to cast shadows, which could be measured to determine the time of day and the position of the Sun.
The telescope dramatically changed the landscape of astronomical observation. It provided a significant magnification, allowing for the observation of much fainter objects and greater detail.
It's important to remember that the knowledge and understanding of the cosmos accumulated by ancient astronomers, even without the aid of telescopes, laid the foundation for the scientific advancements that followed. They developed sophisticated systems for charting the stars and planets, providing crucial information for navigation, calendar development, and understanding the cosmos.
