* Speed of light: The speed of light in a vacuum is approximately 299,792,458 meters per second (often rounded to 300,000,000 m/s). This is represented by the symbol "c".

* Distance traveled in one Earth year:

* To calculate this, we need to know how many seconds are in a year:

* There are 60 seconds in a minute, 60 minutes in an hour, 24 hours in a day, and approximately 365.25 days in a year.

* This gives us a total of 365.25 days/year * 24 hours/day * 60 minutes/hour * 60 seconds/minute = 31,557,600 seconds in a year.

* Now, multiply the speed of light by the number of seconds in a year:

* 299,792,458 m/s * 31,557,600 s/year = 9,460,730,472,580,800 meters

* This distance is often expressed in light-years, where one light-year is the distance light travels in one year.

* So, light travels approximately 1 light-year in one Earth year.

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