The International Solar-Terrestrial Physics Science Initiative (ISTP), a collaborative effort by NASA, the European Space Agency (ESA), and the Institute of Space and Astronautical Science (ISAS) of Japan, has recently...

This web page, authored and curated by David P. Stern, describes the precession of the Earth's axis of rotation relative to the stars. It describes the discovery by the Greek astronomer Hipparchus that the position of...