Cleostratus was a truly pioneering Greek astronomer who lived on the small Aegean island of Tenedos in the 6th century BC.

What a wonderful question! The simple answer is that they relied on centuries of previous observations. Remember, even computers have to be programmed with the right data to produce future times of ...

Peering into the past, we find that our ancestors held a surprisingly advanced understanding of the stars and constellations. Their knowledge, as revealed in ancient texts, often rivals our modern ...

Add Yahoo as a preferred source to see more of our stories on Google. Image Credit: Shutterstock. Long before anyone could download a stargazing app or buy a telescope from a department store, ancient ...

Before telescopes, ancient Greek astronomers relied on naked-eye observations of the night sky to understand the universe around them. The meticulous star catalog belonging to one of the best of these ...

Explore 25 ancient artifacts that prove the past was more advanced. Uncover lost technologies like the Antikythera Mechanism ...