Astronomical year numbering - Wikipedia
Astronomical year numbering is based on AD/CE year numbering, but follows normal decimal integer numbering more strictly. Thus, it has a year 0; the years before that are designated with negative numbers and the years after that are designated with positive numbers. [1]
Year - Wikipedia
A year is the time taken for astronomical objects to complete one orbit. For example, a year on Earth is the time taken for Earth to revolve around the Sun.
How Long Is a Tropical Year / Solar Year? - timeanddate.com
A tropical year, also known as a solar year, an astronomical year, or an equinoctial year, is, on average, approximately 365 days, 5 hours, 48 minutes and 45 seconds long (365.24219 days). How Long Is a Day on Earth?
Definition of 'astronomical year' - Collins Online Dictionary
the period of time, the sidereal year, during which the earth makes one revolution around the sun, measured between two successive conjunctions of a particular distant star: equal to 365.256 36 days 6.
NASA - Year Dating Conventions - NASA Eclipse Web Site
The "astronomical" dating system refers to an alternative method of numbering years. It includes the year "0" and eliminates the need for any prefixes or suffixes by attributing the arithmetic sign to the date. Thus, the astronomical date for 2000 CE is simply +2000 or 2000.
Astronomical year numbering facts for kids - Kids encyclopedia
Astronomical year numbering is based on AD/CE year numbering, but follows normal decimal integer numbering more strictly. Thus, it has a year 0; the years before that are designated with negative numbers and the years after that are designated with positive numbers.
NASA - Calendar Dates
All pages in this web site employ the astronomical numbering system for dates (they use the year 0). Years prior to the year 0 are represented by a negative sign. Historians should note that there is a difference of one year between astronomical dates and BCE dates.
Year | Calendar, Astronomy & Timekeeping | Britannica
Year, time required for Earth to travel once around the Sun, about 365 1 4 days. This fractional number makes necessary the periodic intercalation of days in any calendar that is to be kept in step with the seasons.
Year -- from Eric Weisstein's World of Astronomy
The anomalistic year is the time from one perihelion to the next. The eclipse year is the time from node to node passage of the Moon. To a layperson, the unqualified term "year" means the number of days in the calendrical year. To an astronomer, however, the unqualified term "year" is generally taken to mean the tropical year, which has length
ASTRONOMICAL YEAR Definition & Meaning | Dictionary.com
The astronomical year is reckoned as beginning when the sun enters Capricorn, our winter solstice, and is thus more reasonably defined than is the commencement of our New Year, …