Gyr – 俄语翻译

Gyr [dʒai(ə)-] 名词

Гигагод (кратная году единица измерения времени, равная миллиарду лет. Применяется преимущественно в космологии, а также в геологии и в науках, связанных с изучением истории Земли. Vicomte)

自然科学

миллиард лет (A billion years or giga-annum (10⁹ years) is a unit of time on the petasecond scale, more precisely equal to 3.16×10¹⁶ seconds (or simply 1,000,000,000 years). The terms are used in geology, paleontology, geophysics, astronomy, and physical cosmology. Byr was formerly used in English-language geology and astronomy as a unit of one billion years. Subsequently, the term gigaannum (Ga) has increased in usage, with Gy or Gyr still sometimes used in English-language works (at the risk of confusion with Gy as abbreviation for the gray, a unit of radiation exposure). Astronomers use Gyr or Gy (or Ga, where the a stands for annum, Latin for "year") as the symbol for gigayear.