The Kodaikanal Solar Observatory run by the Indian Institute of Astrophysics located on the southern tip of India has recorded images of the Sun every day since 1904 As a result the KSO is one of ...

We now know that this apparent retrograde motion happens because Earth is constantly ... Earth orbits around the sun at a speed of 67,100 miles per hour (30 kilometers per second).

March is here, and Mercury goes retrograde from March 14 until April 7 — the retrograde begins as the full moon and lunar eclipse occur this month, with no shortage of passed-down mythologies and ...