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How many meters are in a lightyear?

Question:

How many meters are in a light year?

Answer and Explanation:

There are approximately 9.5x1015 meters in a light year.

One light year is the distance that light travels in a vacuum in one year. The speed of light is 3x108 m/s.

One year has 365x24x60x60 seconds.

So, in one year, light will travel (3x108) x (365x24x60x60) meters = (3x108) x 31,536,000 m = 94608x1011 m = 9.5x1015 m

Therefore, 1 light year is approximately 9.5x1015 m.


Learn more about this topic:

Astronomical Units & Light Years: Definition & Examples

from Physical Science: Middle School

Chapter 3 / Lesson 6
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