Changes

The advance (or precession<ref>A "precession" is a slow gyration of an axis of rotation such that it traces a cone.</ref>) of the perihelion of Mercury is observed but not predicted by an elementary application of Newtonian mechanics to Mercury and the sun alone.  This provided one of the great mysteries of physics around the turn of the century.  A planet's "perihelion" is the point in its path of orbit that comes closest to the sun.  For Mercury, that point of closest proximity is shifting with each revolution.

The advance (or precession<ref>A "precession" is a slow gyration of an axis of rotation such that it traces a cone.</ref>) of the perihelion of Mercury is observed but not predicted by an elementary application of Newtonian mechanics to Mercury and the sun alone.  This provided one of the great mysteries of physics around the turn of the century.  A planet's "perihelion" is the point in its path of orbit that comes closest to the sun.  For Mercury, that point of closest proximity is shifting with each revolution.

The [[theory of relativity]] developed to explain the then-observed shift in Mercury's perihelion of 43 arc-seconds per century.  Subsequently, however, more accurate measurements with more sophisticated technology have determined this precession to be 55 arc-seconds per century, nearly 30% off the number provided by relativity.  Other sources of the deviation have been suggested by physicists attempting to explain the ga

The [[theory of relativity]] developed to explain the then-observed shift in Mercury's perihelion of 43 arc-seconds per century.  Subsequently, however, more accurate measurements with more sophisticated technology have determined this precession to be 55 arc-seconds per century, nearly 30% off the number provided by relativity.  Other sources of the deviation have been suggested by physicists attempting to explain the gap.

== Wave Functions ==

== Wave Functions ==