Julian Year (astronomy)
In astronomy, a Julian year (symbol: a) is a unit of measurement of time defined as exactly 365.25 days of 86,400 SI seconds each. The Julian year is the average length of the year in the Julian calendar used in Western societies in previous centuries, and for which the unit is named. Nevertheless, because an astronomical Julian year measures duration rather than designating a date, this Julian year does not correspond to years in the Julian calendar or any other calendar. Nor does it correspond to the many other ways of defining a year.
Other articles related to "julian, astronomy, year":
... A Julianyear should not be confused with the Julianday (also Julianday number or JDN), which is also used in astronomy ... The Julianday uniquely specifies a date without reference to its day, month, or yearin any particular calendar ...
Famous quotes containing the words julian and/or year:
“The rich were dull and they drank too much or they played too much backgammon. They were dull and they were repetitious. He remembered poor Julian and his romantic awe of them and how he had started a story once that began, The very rich are different from you and me. And how someone had said to Julian, Yes, they have more money.”
—Ernest Hemingway (18991961)
“The golden mean in ethics, as in physics, is the centre of the system and that about which all revolve, and though to a distant and plodding planet it be an uttermost extreme, yet one day, when that planets year is completed, it will be found to be central.”
—Henry David Thoreau (18171862)