BYA

#REDIRECT bya

Bya

In astronomy, geology, and paleontology, bya is an acronym for billion years ago and is used as a unit of time to denote length of time before the present (time). Specifically, one bya is equal to 10⁹ years ago. The "billion" in bya is, by convention, the short-scale billion (10⁹), not the long-scale billion (10¹²). For this reason, there is some potential for confusion, and some scientists prefer the unit Gya. However, bya remains in more widespread use. It should be noted that like the related unit mya ("million years ago"), bya is traditionally written in lowercase. This is different from Gya, which capitalization the first letter. == See also == * annum * Before Present * Gya * mya (unit) Units of time

See other meanings of words starting from letter:

B

BA | BC | BD | BE | BF | BG | BH | BI | BJ | BK | BL | BM | BN | BO | BP | BR | BS | BT | BU | BW | BX | BY | BZ |

Words begining with Bya:

BYA
Bya
Byahmul
Byakhee
Byakko
Byakugan
Byakugan
Byala
Byala_(Ruse)
Byala_(Ruse_oblast)
Byala_(Varna)
Byala_(Varna_oblast)
Byala_Cherkva
Byala_Slatina
Byala_Tcherkva
Byalo_More
Byam_Martin_Island
Byankamz
Byap
Byard's_Leap
Byards_Leap
Byars,_OK
Byars,_Oklahoma
Byatis