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January 7, 2018 03:40:50 Mars 13' south of Jupiter 58.8° West February 21, 2018 14:19:55 Venus 35' south of Neptune 10.5° East February 25, 2018 10:07:00 Mercury 29' south of Neptune 6.9° East March 5, 2018 18:28:59 Mercury 1°24' north of Venus 13.4° East March 18, 2018 01:16:29 Mercury 3°53' north of Venus 16.4° East March 29, 2018 0:13:21
The Astronomical Almanac for 1984 through 2002 were based on JPL ephemeris DE200, and from 2003 to 2014 the Astronomical Almanac was based on JPL ephemeris DE405. [9] As of 2022, the Almanac is derived from DE430. [15] The JPL ephemerides are widely used for planetary science; some examples are included in the Notes and References.
A graphical view of the Cosmic Calendar, featuring the months of the year, days of December, the final minute, and the final second. The Cosmic Calendar is a method to visualize the chronology of the universe, scaling its currently understood age of 13.8 billion years to a single year in order to help intuit it for pedagogical purposes in science education or popular science.
In [Astronomical Algorithms], the 'B.C.' years are counted astronomically. Thus, the year before the year +1 is the year zero, and the year preceding the latter is the year −1. The year which historians call 585 B.C. is actually the year −584. The astronomical counting of the negative years is the only one suitable for arithmetical purpose.
Beginning of the 16th century in the Islamic calendar. 75 2100, March 1 First century non-leap year since 1900. 75 2100, March 14 On March 14 (which will be February 29 in the Julian calendar), the difference between the Julian calendar and the Gregorian calendar reaches 14 days. Since 14 is divisible by 7, this will be the first time in ...