In the Vinony graph
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GY, Gy, or gy may refer to:
==Units of measurement== Gray (unit) (Gy), SI unit of absorbed radiation Giga-year, 1,000,000,000 years (non-SI) Galactic year, the time it takes for the Solar System to orbit the Galactic Center
Excerpted from Wikipedia’s “Gy” article, available under the CC BY-SA 4.0 licence.