Gy

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GY, Gy, or gy may refer to:

Measurement[edit]

  • gray (unit) (Gy), SI unit of absorbed radiation
  • giga-year, 1,000,000,000 years (non-SI)
  • A galactic year, the time it takes for the solar system to orbit the galactic center

Places[edit]

Transport[edit]

People with the surname[edit]

Other uses[edit]