Simon, J.L.; Bretagnon, P.; Chapront, J.; Chapront-Touzé, M.; Francou, G.; Laskar, J. (February 1994). "Numerical expressions for precession formulae and mean elements for the Moon and planets". Astronomy and Astrophysics. 282 (2): 663–683. Bibcode: 1994A&A...282..663S.

Day Numbers for 2021 - Epoch Converter Day Numbers for 2021 - Epoch Converter

The Besselian year is a tropical year that starts when the (fictitious) mean Sun reaches an ecliptic longitude of 280°. This is currently on or close to January 1. It is named after the 19th-century German astronomer and mathematician Friedrich Bessel. The following equation can be used to compute the current Besselian epoch (in years): [14] B = 1900.0 + (Julian date TT − 2 415 020.313 52) / 365.242 198 781 This term is sometimes erroneously used for the draconic or nodal period of lunar precession, that is the period of a complete revolution of the Moon's ascending node around the ecliptic: 18.612 815 932 Julian years ( 6 798.331 019 days; at the epoch J2000.0). It’s about highlighting all these amazing people who have either done things in the past, like activism which has helped us progress – people who put their lives on the line and who’ve done things other people wouldn’t have done," explains Laney. Geology, paleontology, and archaeology for the Holocene and Pleistocene periods, where a non− radiocarbon dating technique such as ice core dating, dendrochronology, uranium-thorium dating or varve analysis is used as the primary method for age determination. If age is determined primarily by radiocarbon dating, then the age should be expressed in either radiocarbon or calendar (calibrated) years Before Present.For example, the U.S. National Institute of Standards and Technology (NIST) Guide for the Use of the International System of Units (SI) supports the symbol "a" as the unit of time for a year. [22] Ashman was diagnosed with HIV in the late-80s and died aged 40 in 1991. The following year, along with his co-writers, he was posthumously awarded the Best Original Song Oscar for Beauty And The Beast – the first time an Academy Award had gone to somebody lost to Aids. The Gregorian calendar era is the world's most widely used civil calendar. [6] Its epoch is a 6th century estimate of the date of birth of Jesus of Nazareth. Two notations are used to indicate year numbering in the Gregorian calendar: the Christian " Anno Domini" (meaning "in the year of the Lord"), abbreviated AD; and " Common Era", abbreviated CE, preferred by many of other faiths and none. Year numbers are based on inclusive counting, so that there is no "year zero". Years before the epoch are abbreviated BC for Before Christ or BCE for Before the Common Era. In Astronomical year numbering, positive numbers indicate years AD/CE, the number 0 designates 1 BC/BCE, −1 designates 2 BC/BCE, and so on.

365 Gays of the Year (Plus 1 for a Leap Year): Discover 365 Gays of the Year (Plus 1 for a Leap Year): Discover

Precession of the Earth's Axis - Wolfram Demonstrations Project". demonstrations.wolfram.com . Retrieved February 10, 2019. General Instructions - Monthly Notices of the Royal Astronomical Society - Oxford Academic". Oxford University Press. November 3, 2022.Richards, E.G. (2013). Calendars. In S.E. Urban & P.K. Seidelmann (Eds.), Explanatory Supplement to the Astronomical Almanac (3rd ed.). Mill Valley, CA: University Science Books. p. 586. A fun and fascinating compendium of LGBTQ+ icons, one for every day of the year, and a celebration of queer history – or as RuPaul would say; Herstory! Lady Phyll is really championing activism and purpose. She has her fingers in so many pies and does so much, she is just wonderful," says Laney. "I’m really pleased that she’s at the front of the book and is one of the first people you can read about."