Question

how many second is there in a lightyear?​

Answer 1

Explanation:

31,557,600

The more commonly used light-year is also currently defined to be equal to precisely 31,557,600 light-seconds, since the definition of a year is based on a Julian year (not the Gregorian year) of exactly 365.25 days, each of exactly 86400 SI seconds.

Answer 2

Answer:

31,557,600

The more commonly used light-year is also currently defined to be equal to precisely 31,557,600 light-seconds, since the definition of a year is based on a Julian year (not the Gregorian year) of exactly 365.25 days, each of exactly 86400 SI seconds.