#2rn

Today in Irish History – 1 January:

The Dublin Julian Day (DJD) is the number of days that has elapsed since the epoch of the solar and lunar ephemerides used from 1900 through 1983, Newcomb’s Tables of the Sun and Ernest W. Brown’s Tables of the Motion of the Moon (1919). This epoch was noon UT on 0 January 1900, which is the same as noon UT on 31 December 1899. The DJD was defined by the International Astronomical Union at their…

Today in Irish History – 1 January:

The Dublin Julian Day (DJD) is the number of days that has elapsed since the epoch of the solar and lunar ephemerides used from 1900 through 1983, Newcomb’s Tables of the Sun and Ernest W. Brown’s Tables of the Motion of the Moon (1919). This epoch was noon UT on 0 January 1900, which is the same as noon UT on 31 December 1899. The DJD was defined by the International Astronomical Union at their…