Changes

* about 0.306601 parsecs

* about 0.306601 parsecs

The figures above are based on a [http://en.wikipedia.org/wiki/Julian_year_(astronomy) Julian year] (not Gregorian year) of exactly 365.25 days (each of exactly 86,400 SI seconds, totalling 31,557,600 seconds)[4] and a defined speed of light of 299,792,458 m/s, both included in the IAU (1976) [http://en.wikipedia.org/wiki/Astronomical_constant System of Astronomical Constants], used since 1984. The DE405 value of the astronomical unit, 149,597,870,691 m, is used for the light-year in astronomical units and parsecs.

The figures above are based on a [http://en.wikipedia.org/wiki/Julian_year_(astronomy) Julian year] (not Gregorian year) of exactly 365.25 days (each of exactly 86,400 SI seconds, totalling 31,557,600 seconds)[4] and a defined speed of light of 299,792,458 m/s, both included in the IAU (1976) [http://en.wikipedia.org/wiki/Astronomical_constant System of Astronomical Constants], used since 1984. The DE405 value of the astronomical unit, 149,597,870,691 m, is used for the light-year in astronomical units and parsecs.[http://en.wikipedia.org/wiki/Light_year]

[[Category: Astronomy]]

[[Category: Astronomy]]