#OTD in Irish History – 1 January (Eanáir):

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 […]

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#OTD in Irish History – 1 January (Eanáir):

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 […]

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