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

pt. I. Astronomy in art -- Monet and Turner, masters of sea and sky -- Vincent van Gogh and starry skies over France -- Edvard Munch : mysterious skies in Norway -- Yosemite moonrises and moonbows -- ...

Indian astronaut Shubhanshu Shukla walks in the footsteps of ancient geniuses like Aryabhata, who calculated the value of pi accurately. The tantalising possibility of finding traces of life elsewhere ...

pt. I. Ancient astronomy, from its origins to the end of the Middle Ages. The origins of astronomy -- Primitive astronomy in China, Chaldea and Egypt -- The cosmology of primitive peoples -- The ...

Stretching across two-thirds of our planet, Asia harbors secrets that span millions of years of human history. From the ...

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 ...