// multi-utility computation suite · offline · instant · precise
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sci.astronomy-light-year Calculator
Calculates distances in light-years from metres or parsecs and estimates travel times at fractional speeds of light. One light-year = 9.461 × 10¹⁵ m — the nearest star, Proxima Centauri, is 4.24 light-years away.
Inputs
Ly
Reference formula or conversion factor shown for context.
Results
light years
Reference formula or conversion factor shown for context.
parsecs
Reference formula or conversion factor shown for context.
AU
Reference formula or conversion factor shown for context.
km
Reference formula or conversion factor shown for context.