Until the telescope was invented their greatest tool was the human eye.
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Since the numbers astronomers use are often very large or very small, they frequently use scientific notation to describe sizes and sentences in the universe.
some tool were not machine guns, computer and boots
The device that astronomers use to find the angle between the horizon and stars in the sky is called a sextant.
Astronomers and astrologers were the ancient numerical calculators. their intellectual works had major influence and motivation for advances in mathematics. The traditional astrologer community "Ganaka" was the real mathematicians of ancient Kerala. Non European roots of mathematics extends up to them. Their lore was later learned by many other classes.