light year

ریشه

The word 'light' comes from Middle English 'light', from Old English 'lēoht', from Proto-Germanic 'leuhtaz'. The word 'year' comes from Old English 'gēar', from Proto-Germanic 'jērą'.

مثال

• Proxima Centauri, the closest star to our solar system, is about 4.24 light years away.
• The light year is used as a unit of measurement in astronomy to describe vast distances.
• It would take light approximately 100,000 years to travel across the Milky Way galaxy.