Definition of Julian epoch. Meaning of Julian epoch. Synonyms of Julian epoch

Here you will find one or more explanations in English for the word Julian epoch. Also in the bottom left of the page several parts of wikipedia pages related to the word Julian epoch and, of course, Julian epoch synonyms and on the right images related to the word Julian epoch.

Definition of Julian epoch

Julian epoch
Julian Jul"ian (?; 277) a. [L. Julianus, fr. Julius. Cf. July, Gillian.] Relating to, or derived from, Julius C[ae]sar. Julian calendar, the calendar as adjusted by Julius C[ae]sar, in which the year was made to consist of 365 days, each fourth year having 366 days. Julian epoch, the epoch of the commencement of the Julian calendar, or 46 b. c. Julian period, a chronological period of 7,980 years, combining the solar, lunar, and indiction cycles (28 x 19 x 15 = 7,980), being reckoned from the year 4713 B. C., when the first years of these several cycles would coincide, so that if any year of the period be divided by 28, 19, or 15, the remainder will be the year of the corresponding cycle. The Julian period was proposed by Scaliger, to remove or avoid ambiguities in chronological dates, and was so named because composed of Julian years. Julian year, the year of 365 days, 6 hours, adopted in the Julian calendar, and in use until superseded by the Gregorian year, as established in the reformed or Gregorian calendar.

Meaning of Julian epoch from wikipedia

- In astronomy, an epoch or reference epoch is a moment in time used as a reference point for some time-varying astronomical quantity. It is useful for the...
- and periodization, an epoch or reference epoch is an instant in time chosen as the origin of a particular calendar era. The "epoch" serves as a reference...
- equinoxes and epochs have been su****ded by Julian equinoxes and epochs. The current standard equinox and epoch is J2000.0, which is a Julian epoch. Besselian...
- epoch to which they pertain must be specified. A new standard epoch is chosen about every 50 years. The standard epoch in use today is Julian epoch J2000...
- leap seconds). Because the starting point or reference epoch is so long ago, numbers in the Julian day can be quite large and ****bersome. A more recent...
- In computing, an epoch is a fixed date and time used as a reference from which a computer measures system time. Most computer systems determine time as...
- seconds that have elapsed since 00:00:00 UTC on 1 January 1970, the Unix epoch. In modern computing, values are sometimes stored with higher granularity...
- E.R. Hope proposed the use of Anterior Epoch (AE), which also begins at the same point. Conversion from Julian or Gregorian calendar years to the Human...
- currently used standard epoch is J2000.0, which is January 1, 2000 at 12:00 TT. The prefix "J" indicates that it is a Julian epoch. Prior to J2000.0, astronomers...
- limiting the total amount of additional matter added. During this early epoch, galaxies undergo a major burst of star formation. During the following...