* A light-year is the distance light travels in one year.
* Light travels at a speed of approximately 299,792,458 meters per second.
To calculate the relationship:
1. Seconds in a year: There are 365.25 days in a year, 24 hours in a day, 60 minutes in an hour, and 60 seconds in a minute. So, a year has 365.25 * 24 * 60 * 60 = 31,557,600 seconds.
2. Distance in a year: Multiply the speed of light by the number of seconds in a year: 299,792,458 m/s * 31,557,600 s = 9,460,730,472,580,800 meters.
Therefore, one light-year is equal to approximately 9,460,730,472,580,800 meters.
Key point: Light-years are used to measure vast distances in space, as using meters would result in extremely large and unwieldy numbers.
