How long is one light year?



  1. 0 Votes

    One light year is the distance that ‘light’ can travel in a given year, so it is actually a distance of measure. With the speed of light measuring in at 300,000 kilometers a second, light can travel just shy of 10 trillion kilometers in one year. Even at this rate, the nearest star to Earth is still 4 light years away.

  2. 0 Votes

    A light year is a measure of distance- how far light can travel in one years time. Light travels at a speed of about 186,000 miles per second. There are approximately 31,536,000 seconds in a year, meaning that light can travel at about 5,900,000,000,000 miles per year. The edge of the universe is 15 billion light years away from Earth, demonstrating just what an unfathomably large unit of measurement light years are!

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