Shi Shen's Star Catalogue, also called the Star Manual of Master Shi, was deduced to be the world's oldest by scientists ...

The outer set of symbols represents where the earth would have been in ancient times, while the inner set represents the current locations. The difference is due to the gradual precession of the earth ...

If the sky is clear and the sun is not obstructed by the clouds one can place a vertical object on a leveled ground and see ...

Yellowish-orange Arcturus is the fourth-brightest star in all the heavens and lies only about 37 lightyears from us. It’s an immense star — a red giant, we call it — about 25 times larger, and about ...

Changes in Earth's orbit have helped pace climatic change for millennia. Scientists are now trying to understand whether - and how - these changes remodeled the landscapes our ancient ancestors ...