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The correct abbreviation is LY.

- A kilo light-year is KLY.

(1,000 light-years).

- A mega light-year MLY.

(1 million light-years).

- A giga light-year is GLY.

(1 billion light-years).

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∙ 14y ago
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Fred McCellan

Lvl 1
∙ 5y ago
Correct abbreviation is ly. A kilo ly is kly, Mega ly Mly, and Giga ly is Gly. The metric system ALWAYS uses k for 1000, NOT K. A capital K is a computer abbreviation meaning 1024. For example, a thousand Hertz is kHz, NOT KHz.

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