who discovered the first known instance of proper motion
Proper motion Proper motion was suspected by early astronomers (according to Macrobius, AD 400) but a proof was not provided until 1718 by Edmund Halley, who noticed that Sirius, Arcturus and Aldebaran were over half a degree away from the positions charted by the ancient Greek astronomer Hipparchus roughly 1850 years earlier.[23]
Vikramashila Vikramashila was founded by
Euphrates The Euphrates (/
Masoretic Text The Masoretic[1] Text (MT or
Boyle's law where P is the pressure of the gas, V is the volume of the gas, and k is a constant.
The Pale The word pale derives ultimately from the Latin word