bya or b.y.a. is an abbreviation for " billion years ago ". It is commonly used as a unit of time to denote length of time before the present in 10 years. This initialism is often used in the sciences of astronomy , geology , and paleontology .
4-669: (Redirected from GYA ) Gya or GYA may refer to: Gya , symbol for gigayears ago , a unit of time equal to one billion (short-scale, i.e. 1,000,000,000) years before present. Gya, symbol for the gray , a unit of radiation exposure, equal to 100 roentgen Gya, Ladakh , a village in India Global Young Academy , an association of early-career scientists Guayaramerín Airport , an airport in Bolivia Gulf Yachting Association ,
8-633: A boating organization on the United States coast along the Gulf of Mexico Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with the title Gya . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=Gya_(disambiguation)&oldid=1144263290 " Category : Disambiguation pages Hidden categories: Short description
12-506: Is different from Wikidata All article disambiguation pages All disambiguation pages Gya The "billion" in bya is the 10 "billion" of the short scale of the U.S. , not the long-scale 10 "billion" of some European usage. Billion by this convention (10 ) is often called a "thousand million" in the UK and a "milliard" in some other countries. For this reason, there is potential for some confusion, and some scientists prefer
16-405: The unit Gya, while others prefer Ga (Giga-annum), however, bya remains in more widespread use. In 1974, the UK switched from the long scale to the short scale. Related units are mya ("million years ago"), and byr ("billion years"). These are traditionally written in lowercase . Ga or Gya has a capitalized first letter instead. This standards - or measurement -related article
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